Original Sin

The Catholic claim

By original sin, human nature is deprived of original holiness and justice. We are not born as blank-slate innocents untouched by the Fall; we need Baptism and grace. Christ is the new Adam who conquers what the first Adam lost.

Biblical evidence

Genesis recounts the Fall. Paul teaches that sin and death entered through one man, and that Christ's obedience brings righteousness. David's confession and universal need for grace fit the doctrine's moral realism.

• Genesis 3:1-19

  “Now the serpent was more subtle than any animal of the field which Yahweh God had made. He said to the woman, “Has God really said,”

• Romans 5:12-19

  “Therefore as sin entered into the world through one man, and death through sin; and so death passed to all men, because all sinned.”

• 1 Corinthians 15:21-22

  “For since death came by man, the resurrection of the dead also came by man. For as in Adam all die, so also in Christ all will be made alive.”

• Psalm 51:5

  “Behold, I was born in iniquity. In sin my mother conceived me.”

• Ephesians 2:1-5

  “You were made alive when you were dead in transgressions and sins, in which you once walked according to the course of this world,”

Tradition and magisterium

The Catechism distinguishes original sin from personal sin. Trent defends the doctrine against denials that empty Baptism and the Cross of meaning.

Original sin explains both human dignity (still God's image) and human brokenness (concupiscence, ignorance, death)—without blaming God for evil choices.

History and development

Augustine articulated the Western vocabulary against Pelagius; the East emphasizes ancestral mortality and healing. The Catholic Church holds the core: a real Fall and a real Redeemer.

• The Letter of Barnabas

  Letter of Barnabas 11:1–10 · A.D. 74

  “Regarding [baptism], we have the evidence of Scripture that Israel would refuse to accept the washing which confers the remission of sins and would set up a substitution of their own instead [Ps. 1:3–6]. Observe there how he describes both the water and the cross in the same figure. His meaning is, ‘Blessed are those who go down into the water with their hopes set on the cross.’ Here he is saying that after we have stepped down into the water, burdened with sin and defilement, we come up out of it bearing fruit, with reverence in our hearts and the hope of Jesus in our souls”

• Hermas

  The Shepherd 4:3:1–2 · A.D. 80

  “‘I have heard, sir,’ said I, ‘from some teacher, that there is no other repentance except that which took place when we went down into the water and obtained the remission of our former sins.’ He said to me, ‘You have heard rightly, for so it is’”

• Second Clement

  Second Clement 6:7–9 · A.D. 150

  “For, if we do the will of Christ, we shall find rest; but if otherwise, then nothing shall deliver us from eternal punishment, if we should disobey his commandments. . . . [W]ith what confidence shall we, if we keep not our baptism pure and undefiled, enter into the kingdom of God? Or who shall be our advocate, unless we be found having holy and righteous works?’”

• Justin Martyr

  First Apology 61:14–17 · A.D. 151

  “Whoever are convinced and believe that what they are taught and told by us is the truth, and professes to be able to live accordingly, are instructed to pray and to beseech God in fasting for the remission of their former sins, while we pray and fast with them. Then they are led by us to a place where there is water, and they are reborn in the same kind of rebirth in which we ourselves were reborn: ‘In the name of God, the Lord and Father of all, and of our Savior Jesus Christ, and of the Holy Spirit,’ they receive the washing of water. For Christ said, ‘Unless you be reborn, you shall not enter the kingdom of heaven’”

• Theophilus of Antioch

  To Autolycus 12:16 · A.D. 181

  “Moreover, those things which were created from the waters were blessed by God, so that this might also be a sign that men would at a future time receive repentance and remission of sins through water and the bath of regeneration—all who proceed to the truth and are born again and receive a blessing from God”

Mastery and practice

To master this topic, a student should be able to teach it simply, answer the main objections without caricature, and connect it to the wider map of Catholic faith.

Evidence of mastery: Define original sin without saying babies personally committed Adam's act; Connect original sin to Baptism; Explain concupiscence.

Could the learner explain original sin as diagnosis that makes the Gospel necessary?

• Define original sin without saying babies personally committed Adam's act
• Connect original sin to Baptism
• Explain concupiscence

Common objections

Sources

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