Here is a clear overview of major early Church heresies (false teachings that the early Christian Church rejected). These shaped many Church councils and doctrines.

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🕊️ Major Early Church Heresies

✝️ 1. Gnosticism (1st–3rd Century)

Main idea: Salvation comes through secret knowledge (gnosis).

• Matter is evil, spirit is good
• Jesus only seemed human
• Denied the goodness of creation

📖 Opposed by: St. Irenaeus, St. Tertullian

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👤 2. Docetism

Main idea: Jesus did not really have a physical body—He only appeared human.

• Denied the Incarnation
• Claimed Christ did not truly suffer or die

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🧍‍♂️ 3. Adoptionism

Main idea: Jesus was only a man whom God adopted as Son at baptism or resurrection.

• Denied Jesus’ eternal divinity

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🔥 4. Arianism (4th Century)

Founder: Arius
Main idea: Jesus is not fully God but a created being.

• “There was a time when the Son was not”
• Denied the Trinity’s equality

📜 Condemned at: Council of Nicaea (325 AD)

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👨‍👩‍👧 5. Sabellianism / Modalism

Main idea: God is one person who appears in three modes (Father, Son, Spirit).

• Denied the Trinity as three distinct persons

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🧠 6. Nestorianism (5th Century)

Founder: Nestorius
Main idea: Christ is two separate persons (one divine, one human).

• Denied Mary as Theotokos (Mother of God)

📜 Condemned at: Council of Ephesus (431 AD)

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🩸 7. Monophysitism

Main idea: Jesus has only one nature (divine), not two (divine and human).

• Human nature absorbed into divine nature

📜 Condemned at: Council of Chalcedon (451 AD)

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⚖️ 8. Pelagianism

Founder: Pelagius
Main idea: Humans can save themselves without God’s grace.

• Denied original sin and necessity of grace

📖 Opposed by: St. Augustine

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🛐 9. Manichaeism

Founder: Mani
Main idea: Radical dualism—light vs darkness, spirit vs matter.

• Influenced by Persian religion and Gnosticism
• Considered material world evil

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🏛️ Why These Heresies Matter

They forced the Church to clarify key doctrines such as:

✔ The Trinity
✔ Jesus as true God and true man
✔ The role of grace and salvation
✔ The nature of Mary as Mother of God

This led to the Ecumenical Councils and the Nicene Creed.

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✝️ Simple Memory Trick (Funny)

• Arius said: “Jesus is like God but not God.”
• Nestorius said: “Jesus is two people sharing one body (like roommates).”
• Monophysites said: “Jesus is divine soup—human nature dissolved.”
• Pelagius said: “I can save myself—no grace needed.”