justification

In Christian theology, justification is God's act making a sinner righteous before Him by His grace, received through the faith given to the person by God, for Christ's sake, because of his life, death, and resurrection. Because the meaning of the term is subject to dispute among Christians, simple definitions should be taken with a grain of salt.

Night and day I pondered until I saw the connection between the justice of God and the statement that 'the just shall live by his faith.' Then I grasped that the justice of God is that righteousness by which through grace and sheer mercy God justifies us through faith. Thereupon I felt myself to be reborn and to have gone through open doors into paradise. -Martin Luther

More...