Dr. David P. Scaer Professor of Systematic Theology, Concordia Theological Seminary, Fort Wayne, Indiana Luther placed justification, the doctrine of God's free grace in Jesus Christ, at the heart of his theology. Man is saved not by anything he does or could hope to do, but by what God has done once and for all in Jesus Christ. Since the Reformation, God's accepting the death of Christ in place of the sinner's death has been the hallmark of Protestantism and more specifically of Lutheran churches.
Salvation is sola gratia and sola fide.
God justifies the sinner purely out of His grace through faith without works. Just as no one raises himself from the dead, so no one makes himself a Christian. God, who brought Jesus back from the dead, alone brings believers to Christ and declares them righteous. Lutherans hold that justification is monergistic, a Greek derivative, which means that a thing has only one cause. God alone converts Christians.