Käsemann has quite a way with words, especially when talking about God’s righteousness. In this selection from his book, New Testament Questions of Today, he defines true justification and hence true humanity:
There is no privilege in the face of God’s omnipotence. God’s grace shows its strength always and only in the weak. God’s kingdom is built out of material which is, in itself, unusable. God’s righteousness appears as creation out of nothing and as the resurrection of the dead; and, indeed, in opposition to everything which pretends to be self-made and self sufficient. Only the godless are ever justified. So long as this lesson has not been learned at the foot of the Cross of Jesus, the godhead of God is not truly acknowledged and honoured: and in consequence man has not yet become human.