Justification by faith is an imperative aspect of the Christian faith, regardless of one's denomination. This aspect is underlined at the beginning of the book of Romans when Paul evangelizes in Galatia. Judaizers, who believed that Gentile converts must observe the old law, disagreed with Paul's view that Gentiles needed faith alone to become followers of Christ. Emphasizing the similarities between Jews and Gentiles, he explains justification by faith for all who believe in this powerful verse: “This righteousness from God comes through faith in Jesus Christ to all who believe. There is no difference, for all have sinned and fall short of the glory of God, and are justified freely by his grace through the redemption that came through Christ Jesus (Romans 3:22-2).” The following article will compare and contrast the theology regarding justification by faith held by Catholics versus Lutherans. By first defining both Catholic and Protestant theologies of justification by faith, the key differences, and how they interpret passages differently, we can have a greater understanding of justification by faith (hereafter JBF). Catholic theology holds that justice is a real substance, and that when a person has faith in God, justice is poured into that person. This belief is that a human being is unrighteous before baptism and through continued conversion God makes him truly righteous through sanctifying grace. Catholics also believe that justification and sanctification are the same thing, meaning that someone is righteous not only because they have faith but also through cooperation with the sanctifying grace that is already present. In general, Protestants believe that justification by faith is more of a legal thing, and that God looks... center of paper... talks about Catholicism and Protestant beliefs, but also learned new ways to support my view of justification by faith. I have found that I take aspects from every perspective, my first example being that I believe faith is an ongoing conversion and process towards righteousness, which resembles the Catholic perspective. On the Protestant side, however, I believe that for the most part those who have been justified by faith are still sinners. While I think Romans 1-4 are central to understanding justification by faith, I do not believe they are the center of the New Testament and I believe the Gospels are. By defining the Catholic and Lutheran theologies of the JBF, pointing out their key differences, and providing examples of verses that align with each view, you can have a greater understanding of justification by faith and what it means in your life..