The Doctrine of Original Sin

Season 4 Episode 1

Stained glass depiction of the Fall of Man showing Adam and Eve with the serpent and an angel, illustrating the biblical account of original sin in Genesis.

Special Guest: Cory Reckner

The Doctrine of Original Sin and the Human Condition

Original sin is one of the most foundational doctrines in Christian theology because it explains why human beings sin so naturally, so early, and so consistently. In this episode of The Restless Theologian, we explore the doctrine of original sin and compare how Eastern Orthodox, Roman Catholic, and Reformed theology understand humanity’s fall in Adam.

Federal Headship: Adam and Christ in Romans 5

The Reformed tradition teaches that original sin includes both guilt and corruption inherited from Adam’s first sin. Adam functions as the federal head of humanity, meaning his disobedience brought condemnation to those he represented. This framework helps explain why Scripture can speak of judgment spreading to “all men” in passages such as Romans 5:12–19. The same passage also shows the gospel solution: Christ as the new representative head whose obedience brings justification and life to those united to Him by faith.

Original Sin vs. Ancestral Sin in Eastern Orthodox Theology

A major contrast appears in Eastern Orthodox theology, which prefers the term ancestral sin rather than original sin. In this view humanity inherits corruption and mortality from Adam but not his guilt. The discussion explores whether that concern about justice fits with the Bible’s teaching about corporate responsibility. Passages such as Exodus 20:5 and Jesus’ warnings in Matthew 23 raise important questions about generational judgment and shared accountability.

Concupiscence, the Human Will, and Total Depravity

The episode also examines how original sin relates to the human will, concupiscence, and total depravity. Augustine’s influence on Western theology plays a major role in these debates. Roman Catholic theology affirms that sin is transmitted by propagation rather than imitation, but often treats concupiscence as an inclination rather than sin itself. Reformed theology argues that Scripture teaches sin affects not only actions but also thoughts and desires, meaning every faculty of the human person is touched by the fall.

Original Sin, Regeneration, and the New Birth

Finally, we explore how the doctrine of original sin connects to deeper questions about the origin of the soul, the nature of regeneration, and why Scripture describes humanity as spiritually dead apart from Christ. From Psalm 51 to Romans 5, the biblical testimony shows that Adam’s disobedience reshaped the entire human condition. Understanding original sin ultimately clarifies why salvation must come through grace alone and why the new life offered in Christ is truly a new birth.

FAQs

What is the doctrine of original sin?

Original sin teaches that all humanity inherits both corruption and guilt because of Adam’s first sin in the Garden of Eden. Scripture describes Adam as the representative head of humanity, meaning his disobedience brought condemnation and death to all people (Romans 5:12–19).

What is the difference between original sin and ancestral sin?

Eastern Orthodox theology typically uses the term ancestral sin rather than original sin. In that framework, humanity inherits corruption and mortality from Adam but not his guilt. Western traditions such as Roman Catholic and Reformed theology teach that Adam’s guilt is also imputed to his descendants.

What does “federal headship” mean?

Federal headship refers to the idea that Adam acted as the covenant representative of humanity. When Adam sinned, his guilt was counted to those he represented. In the same way, Christ acts as the new representative head whose obedience brings justification to those united to Him by faith (Romans 5:18–19).

What is concupiscence?

Concupiscence refers to disordered or sinful desire that flows from humanity’s fallen nature. Roman Catholic theology often describes concupiscence as an inclination toward sin, while Reformed theology teaches that these inward desires themselves carry moral guilt because sin affects the entire person.

Are humans spiritually dead or spiritually weakened?

Eastern Orthodox and Roman Catholic theology often describe humanity as spiritually wounded or weakened by the fall. Reformed theology argues that Scripture describes humanity as spiritually dead in sin (Ephesians 2:1–3), meaning regeneration by the Holy Spirit is necessary for salvation.

Why does the doctrine of original sin matter for the gospel?

Original sin explains why salvation must come entirely from God’s grace. If humanity is spiritually dead and guilty before God, then redemption must come through Christ’s obedience and righteousness being credited to believers, just as Adam’s disobedience brought condemnation.