Abraham stands as a profound example of faith and sacrifice, earning his title as the father of the faithful through both his belief and his actions. His journey began with a steadfast trust in God's promise of a son, as seen when he believed at the age of 80, and God accounted this faith as righteousness. This belief, without any accompanying work or ritual, marked the start of his justification, a moment where God imputed righteousness to him simply for trusting in the divine promise. For twenty years, he waited patiently, and at 100 years old, Isaac, the son of promise, was born through the faith of both Abraham and Sarah, who at 90 received strength to conceive because she judged Him faithful who had promised. Yet, Abraham's faith was not merely a mental conviction; it was brought to fruition through his works, most notably in his willingness to sacrifice Isaac on Mount Moriah. This act, occurring perhaps when he was around 125 to 130 years old, demonstrated the completion of his faith. His readiness to offer his son, even to the point of raising the knife, manifested his spiritual belief into tangible action, proving his trust in God's command. Through this sacrifice, his righteousness, initially credited by faith, bore fruit, showing him to be upright when measured against God's standard. His works did not justify him at the beginning, but they revealed the growth of his righteous character over time. This dual aspect of faith and works illustrates a complete process in Abraham's life. His faith initiated his relationship with God, and his sacrificial act on Mount Moriah fulfilled it, spanning a period of about 45 years from the promise to the trial. Throughout his long wait, even during times of peace and prosperity in Beersheba, Abraham never grew complacent. He lived as a sojourner in a foreign land, dwelling in tents, yet his heart was set on the city with foundations, the Kingdom of God, whose builder and maker is God. His steady yearning for this permanent promise kept his faith strong, driving him to press forward despite wealth or comfort, preparing himself through faithfulness for what God had in store. Abraham's example shows that faith and works are inseparable in the life of a believer. Faith starts the journey, but it must be made manifest through actions that prove its reality to God. His life, from the initial promise to the ultimate test of sacrifice, reveals a path of growth toward righteousness, a path that took decades to unfold but remained anchored in his unwavering trust in God's eternal promises.

Abraham is Paul's primary example that justification is a gift received by faith, never earned by works. Genesis 15 says Abraham believed the LORD, and God accounted it to him for righteousness. Wages are a debt, not grace, but the one who does not work and believes on Him who justifies the ungodly has his faith counted as righteousness. Circumcision, which stands for works, was not introduced until Genesis 17, three chapters after righteousness was imputed, so Abraham was justified while still uncircumcised. He is therefore the father of all who believe, and his spiritual children are justified exactly as he was, by faith and not by works. Because Abraham is the father of the faithful, what happened to him is especially important for understanding how we are justified. Justification must come this way because the law was never given to save anyone. It shows what sin is and condemns every sinner, who owes a debt payable only by death. Works would also open the door to human pride, the destroyer of the relationship with God. Yet Abraham's faith did not do away with the law. Genesis 26 says Abraham obeyed God's voice and kept His commandments, statutes, and laws. Justification by grace through faith forgives sin so that we are free in Christ to keep the law as Jesus did.