Abraham Believed God

Paul asks what Abraham "our forefather according to the flesh" discovered, then cites Genesis 15:6: "Abraham believed God, and it was reckoned to him as righteousness." The key verb logizomai, "reckon" or "credit," recurs throughout the chapter and frames righteousness as something accounted to Abraham on the basis of faith rather than earned as wages. Paul reinforces the argument with Psalm 32:1-2, where David pronounces blessed the person whose sins are forgiven and to whom the Lord does not reckon sin.

Paul next exploits the chronology of Genesis. Abraham's faith was reckoned as righteousness before Genesis 17 introduced circumcision; circumcision therefore becomes a "sign" and "seal" of a righteousness already possessed through faith. Abraham can consequently be father both of uncircumcised believers and of circumcised persons who follow his faith. Verses 13-17 extend the same logic to Torah: if inheritance depended on law, faith and promise would be emptied of their function. Scholars debate the precise scope of "law" here, but Paul's contrast concerns promise grounded in grace rather than inheritance secured through Torah possession.

The final section interprets Abraham's faith as confidence in God's life-giving power despite his own aged body and Sarah's barrenness. Paul describes God as the one who "gives life to the dead and calls into existence the things that do not exist," linking the Abraham story typologically with resurrection faith. The Genesis statement was written not for Abraham alone but also for those who believe in the God who raised Jesus. The closing formula says Jesus was "delivered up for our trespasses and raised for our justification"; interpreters debate whether the two clauses distinguish separate saving effects or poetically describe the unified saving significance of death and resurrection.

Romans 4 develops the claim of Romans 3:21-31 by appealing to Abraham as Paul's principal scriptural example of justification by faith apart from works. Paul begins with Genesis 15:6, where Abraham's faith is "reckoned" as righteousness, and supplements it with David's description in Psalm 32 of the blessedness of forgiven sin. He then argues chronologically that Abraham was counted righteous before circumcision, making him the ancestor of believing Gentiles as well as circumcised believers.

The second half turns from circumcision to the promise. Abraham did not receive the promise through the Mosaic law but through the righteousness associated with faith; consequently the promise rests on grace and can extend to all his offspring. Paul presents Abraham's confidence in the God who gives life to the dead as a paradigm for Christian faith in the God who raised Jesus. The chapter therefore connects justification, Abrahamic promise, universal family, resurrection, and grace within a single scriptural argument.