Therefore this alien righteousness, instilled in us without our works by grace alone-while the Father, to be sure, inwardly draws us to Christ- is set opposite original sin, likewise alien, which we acquire without our works by birth alone. Christ daily drives out the old Adam more and more in accordance with the extent to which faith and knowledge of Christ grow. For alien righteousness is not instilled all at once, but it begins, makes progress, and is finally perfected at the end through death.
- Martin Luther, Two Kinds of Righteousness, in Martin Luther's Basic Theological Writings, ed. Timothy Lull (Minneapolis: Fortress Press, 1989).