He sought to restore the personal immediacy of the biblical message and assurance of salvation that comes from trust in the word of God. His main theme is justification by faith. Luther believed that God is conceived centrally through personal rather then metaphysical categories. He brought a new emphasis on the priority and sole sovereignty of divine grace in redemption, and an utter unworthiness and inactivity of recipient of grace, and finally on the absolute priority and decisiveness of divine election. On revelation Luther believed the word of God is Jesus Christ who is revealed through scripture and proclamation.
Word is both the subject and object of revelation and can never be separated from spirit.
Luther believed that evil is inherent in human nature. Human beings are created in the image of God, but this image is lost in the fall. With regard to salvation, Luther believes that no preparation is necessary. Christ has given to us a free gift and he is our fellowship with God. Christ is our righteousness.