Perhaps not quite as salacious as Tillich fans or foes might infer from the title, but here, one of our ‘top three’ favorite heretics (Bultmann and Kuyper – just kidding), contributes this gem on justification from his Systematic Theology:

Justification in the objective sense is the eternal act of God by which he accepts as not estranged those who are indeed estranged from him by guilt and the act by which he takes them into unity with him which is manifest in the New Being of Christ. Justification literally means “making just,” namely, making man that which he essentially is and from which he is estranged. If used in this sense, the word would be identical with Sanctification. But the Pauline doctrine of Justification by grace through faith has given the word a meaning which makes it the opposite pole of Sanctification. It is an act of God which is in no way dependent on man, an act in which he accepts him who is unacceptable. In the paradoxical formula, simul peccator, simul justus, which is the core of the Lutheran revolution, the in-spite-of character is decisive for the whole Christian message as the salvation from despair about one’s guilt. It is actually the only way to overcome the anxiety of guilt; it enables man to look away from himself and his state of estrangement and self-destruction to the justifying act of God. He who looks at himself and tries to measure his relation to God by his achievements increases his estrangement and the anxiety of guilt and despair.