The true way of salvation is this. First, a person must realize that he is a sinner, the kind of a sinner who is congenitally unable to do any good thing. "Whatsoever is not of faith, is sin." Those who seek to earn the grace of God by their own efforts are trying to please God with sins. They mock God, and provoke His anger. The first step on the way to salvation is to repent.
The second part is this. God sent His only-begotten Son into the world that we may live through His merit. He was crucified and killed for us. By sacrificing His Son for us God revealed Himself to us as a merciful Father who donates remission of sins, righteousness, and life everlasting for Christ's sake. God hands out His gifts freely unto all men. That is the praise and glory of His mercy.
We say, faith apprehends Jesus Christ. Christian faith is not an inactive quality in the heart. If it is true faith it will surely take Christ for its object. Christ, apprehended by faith and dwelling in the heart, constitutes Christian righteousness, for which God gives eternal life.
Martin Luther, Commentary on the Epistle to the Galatians