Saint Simon the Apostle: Zeal and Mission Explained

Saint Simon the Apostle: Simon the Zealot, Faithful Witness of Christ

Introduction

Saint Simon the Apostle, traditionally known as Simon the Zealot, was one of the Twelve Apostles chosen by Jesus Christ. Although the New Testament provides very little information about his personal life, his name appears in all four lists of the Apostles. The Church remembers him as one of the men whom Jesus called to leave their former lives and become witnesses to the Gospel.

Simon is distinguished from Simon Peter by the title the Zealot. The Gospel of Matthew and the Gospel of Mark call him the Cananaean, while Luke and the Acts of the Apostles call him the Zealot (Matthew 10:4; Mark 3:18; Luke 6:15; Acts 1:13).

The precise details of Simon’s life before his calling, his missionary journeys, and his death remain uncertain. Later Christian traditions associate him with the preaching of the Gospel in distant lands and with martyrdom. In Western Christianity, he is commemorated together with Saint Jude the Apostle on October 28.

Saint Simon’s life invites us to reflect on the meaning of zeal, conversion, discipleship, and faithful witness. His example reminds us that Christ can take the passion and dedication present in a person’s heart and direct them towards the service of God’s Kingdom.

1. Simon the Apostle in the New Testament

Simon appears in the lists of the Twelve Apostles recorded in the Gospels and the Acts of the Apostles.

In Matthew 10:2–4, Mark 3:16–19, Luke 6:13–16, and Acts 1:13, his name appears among the disciples chosen by Jesus for a special mission.

The New Testament does not give us a detailed biography of Simon. Unlike Peter, John, and several other Apostles, he is not the central figure in any recorded Gospel episode. We do not hear him speak directly in the biblical narrative, nor are we told about his family, occupation, or place of birth.

Nevertheless, his inclusion among the Twelve is significant. Jesus chose him to belong to the inner circle of disciples who accompanied Him during His public ministry and were entrusted with the proclamation of the Gospel.

The Twelve were not simply followers who admired Jesus from a distance. They were called to learn from Him, witness His works, participate in His mission, and eventually carry His message to the world.

Simon shared this vocation with the other Apostles. His name in the biblical lists is a lasting reminder that he belonged to the group entrusted with the foundational mission of the Church.

2. Why Was Simon Called the Zealot?

One of the most distinctive features of Simon’s identity is his title, the Zealot.

The Gospel of Luke calls him “Simon who was called the Zealot” (Luke 6:15), and Acts 1:13 uses the same designation. Matthew and Mark instead describe him as the Cananaean, a term traditionally understood in this context as corresponding to the idea of zeal.

The title has led to considerable discussion among biblical scholars.

Zeal for the Law of God

One interpretation is that Simon was known for his strong religious devotion and zeal for the Law of God. In Jewish religious life, zeal could express a passionate commitment to the covenant, the worship of the one true God, and the observance of God’s commandments.

Under this interpretation, Simon’s title identified him as a man of deep religious conviction.

A possible connection with the Zealot movement

Another possibility is that Simon had some connection with the Jewish Zealot movement, whose members resisted Roman domination and defended Jewish religious and national identity.

However, the New Testament does not explicitly establish that Simon belonged to this political movement before becoming an Apostle. The title alone is insufficient to prove such an affiliation.

It is therefore more accurate to say that Simon was known as the Zealot while acknowledging that the precise meaning of the designation remains uncertain.

Whatever its original meaning, the title distinguishes Simon from the other Apostles and highlights the intensity associated with his identity.

Zeal transformed by Christ

Simon’s place among the Twelve invites a spiritual reflection. Whatever form his zeal took before his calling, his apostolic vocation placed his life at the service of Jesus Christ.

The Gospel did not ask him to become indifferent or passive. It called him to direct his convictions towards a new mission: proclaiming the Kingdom of God, witnessing to the love of Christ, and serving the salvation of humanity.

Christian conversion often involves this kind of transformation. God does not necessarily remove the strength of our personality. Rather, He purifies our intentions and directs our gifts towards what is good.

Passion becomes fruitful when it is guided by truth, humility, and love.

3. Jesus Calls Simon to Be an Apostle

The Gospels do not preserve a separate narrative describing the precise circumstances of Simon’s calling. We do know that Jesus chose him as one of the Twelve Apostles.

Mark 3:13–19 describes Jesus going up a mountain, calling those He wanted, and appointing twelve to be with Him and to be sent out to preach.

This passage reveals two essential dimensions of apostolic life.

First, the Apostles were called to remain with Jesus. Before they could preach effectively, they needed to know Him, listen to His teaching, observe His actions, and learn from His relationship with the Father.

Second, they were called to be sent out. Their relationship with Jesus was not intended to remain a private spiritual experience. They were entrusted with a mission to proclaim the Gospel and serve others.

Simon shared both dimensions of this vocation. He was called to communion with Christ and to participation in Christ’s mission.

The same pattern remains at the heart of Christian discipleship. Every apostolate begins with an encounter with Jesus and grows through a willingness to serve.

We cannot give others what we have never allowed Christ to form within us. Prayer, Scripture, the sacraments, and the life of the Church help believers deepen their relationship with the Lord so that their service becomes an authentic expression of the Gospel.

4. Simon Among the Twelve Apostles

The Twelve Apostles came from different backgrounds and possessed different personalities. They included fishermen, a tax collector, and men whose individual histories are only partially known.

Simon the Zealot belonged to this diverse group.

The Gospels do not explain how Simon related personally to the other Apostles, but their shared vocation placed them within one community centred on Jesus.

This community was not free from weakness or misunderstanding. The Gospels reveal disagreements, fear, ambition, and difficulty in understanding the mission of Christ. The Apostles needed to be taught repeatedly about humility, forgiveness, service, and the true meaning of greatness.

Simon’s inclusion in this community demonstrates that the Church’s mission has never depended upon every member having the same background or temperament.

Christ calls different people and forms them into a community united by faith and mission. Their differences need not become obstacles when they are placed at the service of the Gospel.

For the Church today, Simon’s example encourages respect for different gifts, personalities, and experiences within the Christian community. Unity does not require uniformity. It requires a shared commitment to Jesus Christ and a willingness to serve one another in love.

5. Simon and the Mission of the Apostles

After choosing the Twelve, Jesus sent them out to proclaim the coming of the Kingdom of God. Matthew 10:5–15 records instructions given to the Apostles for their mission.

They were to proclaim the message of the Kingdom, heal the sick, and minister to those in need. Their mission was not merely to speak about God but to make His mercy visible through their actions.

Although the New Testament does not describe Simon’s individual activities during this mission, he was one of the Twelve entrusted with this responsibility.

Later, in Acts 1:13–14, Simon appears among the Apostles who gathered in Jerusalem after the Ascension of Jesus. Together with the other disciples and Mary, the Mother of Jesus, they devoted themselves to prayer as they awaited the coming of the Holy Spirit.

This moment is especially important. The Apostles did not immediately begin their mission through their own strength. They waited in prayer for the fulfilment of Christ’s promise.

The Church’s mission is always sustained by the Holy Spirit. Human enthusiasm, intelligence, and organisational ability are valuable, but they cannot replace God’s grace.

Simon’s place among the praying Apostles reminds us that Christian service must remain rooted in prayer and dependence on God.

6. Simon at Pentecost and the Birth of the Church

The Acts of the Apostles recounts the descent of the Holy Spirit upon the disciples at Pentecost (Acts 2:1–13).

The text does not single Simon out for any particular action during this event. However, he is part of the apostolic community whose mission is transformed by the gift of the Holy Spirit.

At Pentecost, the disciples received the courage to proclaim the mighty works of God. The message of Jesus began to reach people from different nations and linguistic backgrounds.

The event revealed the universal character of the Gospel. The Good News was not intended for one ethnic group or geographical region alone. It was destined to be proclaimed to all peoples.

Simon, as one of the Twelve, belonged to the group entrusted with this mission.

His example reminds us that Christian witness depends upon more than natural courage. The disciples had known fear and confusion, but the Holy Spirit strengthened them to speak openly about Christ.

The same Spirit continues to guide the Church, giving believers the gifts necessary for prayer, service, proclamation, and holiness.

7. The Later Life of Saint Simon: What Do We Know?

The New Testament gives little information about Simon after the early chapters of Acts. His later life is described mainly through Christian traditions that developed over subsequent centuries.

These traditions associate him with missionary journeys to various regions, including Egypt, North Africa, Persia, and the areas around the Black Sea. Some accounts also connect him with Britain.

The difficulty is that these traditions do not agree with one another. They differ concerning the places Simon visited, the companions who travelled with him, and the circumstances of his death.

Consequently, it is not possible to construct a completely reliable itinerary of his missionary activity.

Nevertheless, these traditions reflect the Church’s conviction that the Apostles carried the Gospel beyond Jerusalem and Palestine, establishing Christian communities across the ancient world.

Simon is remembered within this wider apostolic mission as a witness who devoted his life to Christ.

The tradition of preaching in Persia

One of the best-known Western traditions associates Simon with Saint Jude the Apostle and places their missionary work in Persia.

According to later accounts, the two Apostles preached together, confronted opposition, and eventually suffered martyrdom.

This tradition became especially influential in the Western Church and contributed to the joint celebration of their feast on October 28.

However, the details of their travels and the precise circumstances of their deaths cannot be established from the New Testament itself.

A historically responsible account should therefore present this as an ancient Christian tradition rather than as a fully documented biography.

8. The Martyrdom of Saint Simon

Saint Simon is traditionally honoured as a martyr, although the exact circumstances of his death remain uncertain.

Several accounts have been preserved in Christian tradition. Some describe him as having been crucified; others associate his death with a saw, the instrument that became his most recognisable artistic symbol.

Other traditions place his martyrdom in Persia or in regions around the Black Sea.

These accounts cannot all be reconciled, and the historical evidence is insufficient to establish a single, certain description of his death.

Why is Simon depicted with a saw?

In Western Christian art, Saint Simon is often represented holding a saw. This symbol refers to the traditional account that he was put to death by being sawn apart.

The New Testament does not record this manner of death. It belongs to the later tradition surrounding his martyrdom.

The saw nevertheless became an enduring symbol of his willingness to remain faithful to Christ even in the face of persecution.

The witness of martyrdom

The word martyr originally means witness. In Christian tradition, martyrs are those who bear witness to Christ through their faithfulness, even when that fidelity leads to death.

The Church honours martyrs because their lives reveal the depth of their commitment to the Gospel. They remind believers that faith is not simply an idea to be accepted when convenient. It is a relationship with Christ that can sustain a person even amid suffering.

Whether considering Simon’s traditional martyrdom or the witness of Christians in later centuries, the essential lesson is the same: fidelity to Christ requires courage, perseverance, and trust in God’s promises.

9. Saint Simon and Saint Jude the Apostle

In the Western Church, Saint Simon is celebrated together with Saint Jude Thaddaeus on October 28.

The New Testament frequently places their names close to one another in the lists of the Twelve. In Matthew 10:3–4 and Mark 3:18, Simon appears next to Jude, while Luke 6:15–16 and Acts 1:13–14 also place them within the same apostolic community.

Later tradition developed the association between the two Apostles, especially through accounts that describe them preaching together and suffering martyrdom together.

Their shared feast honours two men whose individual histories remain largely hidden from us but whose apostolic vocation was central to the foundation of the Church.

Saint Jude is widely invoked in Catholic devotion as a patron in difficult or desperate situations. Saint Simon, meanwhile, is remembered particularly for his apostolic zeal and traditional martyrdom.

Their joint feast invites us to reflect on the fellowship of the Apostles. The work of evangelisation was not the achievement of isolated individuals but the mission of a community united in Christ.

10. Feast Day and Patronage

Feast day: October 28, celebrated together with Saint Jude the Apostle in the Roman Catholic Church.

In several Eastern Christian traditions, Saint Simon is commemorated separately, commonly on May 10.

His principal artistic attribute in Western Christian iconography is the saw, a reference to the traditional account of his martyrdom. He is also sometimes depicted holding a book, representing the apostolic proclamation of the Gospel.

Saint Simon has traditionally been regarded as a patron of tanners, and popular devotional traditions also associate him with sawyers and woodworkers.

These associations arise from the history of his veneration and artistic representation rather than from an explicit statement in Scripture.

11. Spiritual Lessons from the Life of Saint Simon the Apostle

1. Let Christ transform your zeal

Simon’s title, the Zealot, is a reminder that religious enthusiasm must be directed towards the truth and love revealed in Jesus Christ.

Passion without wisdom can become anger or division. Conviction without humility can lead to pride. Genuine Christian zeal seeks the glory of God and the good of others.

We are called to be enthusiastic about the Gospel while remaining patient, compassionate, and willing to listen.

2. God calls people from different backgrounds

Simon belonged to a group of Apostles whose personalities and backgrounds were diverse.

His inclusion among the Twelve reminds us that God does not call only people who are alike. He brings different individuals together and invites them to become one community in Christ.

Differences can become gifts when they are guided by mutual respect and a shared commitment to the Gospel.

3. Faithfulness matters even when recognition is absent

Simon is one of the less prominent Apostles in the biblical narrative. The Gospels tell us very little about his individual words or actions.

Yet his name remains in the apostolic lists, and the Church continues to honour him.

His example reminds us that we do not need to be publicly recognised for our service to have spiritual value. Many people serve God faithfully through hidden acts of love, prayer, and sacrifice.

4. Prayer must sustain our mission

Simon was among the Apostles gathered in prayer after the Ascension.

Their example reminds us that Christian service cannot be sustained by human effort alone. We need the grace of God, the guidance of the Holy Spirit, and the nourishment of prayer.

Before speaking about Christ, we must allow Christ to speak to our hearts.

5. Persevere when faith becomes difficult

The traditional accounts of Simon’s martyrdom portray him as a witness who remained faithful despite persecution.

Although the details of his death remain uncertain, the Church’s remembrance of him invites us to reflect on the courage required to live the Gospel.

Perseverance may involve enduring opposition, refusing dishonesty, defending the dignity of another person, or remaining faithful to prayer during a difficult season.

Not every Christian is called to die for the faith, but every Christian is called to live faithfully.

6. Do not underestimate a hidden vocation

Simon did not leave behind a Gospel or a letter included in the New Testament. Much of his personal history has been lost.

Yet he remains one of the Twelve chosen by Jesus.

His life reminds us that the value of a vocation is not measured by the amount of historical information preserved about it. Faithfulness to Christ is itself a meaningful witness.

12. A Spiritual Reflection: Zeal That Becomes Love

Saint Simon the Apostle invites us to reflect on the kind of zeal that guides our lives.

We live in a world in which people can become passionate about their opinions, ambitions, causes, and personal identities. Such passion can accomplish good things, but it can also become destructive when separated from humility and compassion.

The Christian vocation calls us to something deeper. Our zeal must be shaped by the heart of Jesus.

Jesus did not call His Apostles merely to win arguments or defeat opponents. He called them to proclaim the Kingdom of God, serve the suffering, forgive sinners, and bear witness to divine love.

Simon’s title reminds us that the energy of a passionate heart can become a gift when it is surrendered to Christ.

Perhaps our zeal needs to be transformed in a particular way. We may need to become more patient with those who disagree with us, more courageous in defending the vulnerable, more faithful in prayer, or more generous in serving our families and communities.

The Lord does not ask us to become indifferent. He asks us to love with greater purity and purpose.

Saint Simon’s example also comforts those whose service remains hidden. We may never know the full results of our efforts. We may not receive recognition or see immediate success. Yet a life offered sincerely to God is never meaningless.

Let us ask for the grace to serve Christ with an undivided heart, to proclaim the Gospel through our words and actions, and to remain faithful even when the path becomes difficult.

13. Prayer to Saint Simon the Apostle

Heavenly Father,

You chose Saint Simon the Apostle to be one of the Twelve and entrusted him with the mission of proclaiming the Gospel of Your Son.

Through his example, teach us to direct our enthusiasm towards what is true, good, and pleasing to You. Purify our intentions, strengthen our faith, and help us to serve others with humility and love.

When we grow discouraged, give us perseverance. When we are afraid to speak the truth, give us courage. When our zeal becomes impatience or anger, teach us the gentleness of Christ.

Bless all those who proclaim the Gospel, especially missionaries, priests, religious, catechists, and laypeople who serve the Church in difficult circumstances.

Help us remember that every vocation has value when it is lived faithfully. May we serve You not for recognition or reward but because we love You.

Through the intercession of Saint Simon the Apostle, strengthen us in faith, hope, and charity, and help us become faithful witnesses to Jesus Christ in our daily lives.

We ask this through Christ our Lord.

Amen.

Conclusion

Saint Simon the Apostle, known as Simon the Zealot, was one of the Twelve chosen by Jesus Christ. Although the New Testament preserves few details about his personal life, his place among the Apostles remains a lasting testimony to his vocation.

Later Christian traditions remember him as a missionary and martyr, although the precise details of his journeys and death remain uncertain.

His title invites us to reflect on the transformation of human zeal through discipleship. Christ calls people with different backgrounds, personalities, and gifts, forming them into a community that proclaims the Gospel through faith and love.

Saint Simon reminds us that genuine zeal is not measured by anger, argument, or the desire to prevail over others. It is measured by our willingness to serve God faithfully, love our neighbours, and persevere in the mission entrusted to us.

May his example inspire us to follow Christ with courage, to deepen our lives of prayer, and to become faithful witnesses to the Gospel in every circumstance.

References

The Holy Bible, Matthew 10:2–4; Mark 3:13–19; Luke 6:12–16; Acts 1:12–14.
The Catholic Encyclopedia, “St. Simon the Apostle.” New Advent.
The Catholic Encyclopedia, “Simon, Apostle, Saint.” Catholic Answers, reproducing the historical encyclopedia entry.
Jacobus de Voragine, The Golden Legend, account of Saints Simon and Jude. A medieval hagiographical source that should be read as evidence of later tradition rather than as a contemporary biography.
Benedict XVI, General Audience on the Apostles Simon and Jude, October 11, 2006.
The New Catholic Encyclopedia, entry on Simon the Apostle, discussing the biblical evidence and later traditions concerning his life and martyrdom.