The act of having true faith in Christ is enough justification in Luther's mind to be a Christian. He uses Biblical excerpts to prove this doctrine of "Justification by Faith Alone." Luther identifies with Paul from Romans 10, "for man believes with his heart and so is justified." (10) Accordingly, if only faith can justify the faith of a Christian, then no outer work needs to be performed to justify one's Christianity. The only action that makes you less Christian is when you begin to doubt your faith and start questioning Christ's divinity. …
