In Self-knowledge, Berdyaev observed that he could only accept and experience Christianity as a religion of Godmanhood.
To Berdyaev, Godmanhood entails the understanding that "not only man needs God, but God also needs man." This understanding is not rooted in any notion of replacing God with man or man with God, but rather on the "radical" belief that the eternal divinity of man is godlike. The Christian tradition asserts God as the Creator; Berdyaev postulates that man is also a creator possessing inherent supernatural potential.
The idea that God needs man as much as man needs God contains within it the very meaning of creativity, which is joint action between God and man. God is both father and Creator; man is a co-creating child.
Thus worshiping and glorifying God demands continuing the work of the Father. And the way man continues the work of the Father is through creativity.
Man's creativity is an essential part of God's activity. The transformation of the world is carried out by man, not God - but it can only be carried out by man if he works from his Divine Self and works in accordance to the Divine Plan.
Once he learns this, man will know that is he not a means, but an end. And he will understand that creativity is not a choice between good and evil, but his creation of good and evil.
That is how human power becomes Divine Power.
If man were utterly insignificant and irrelevant to God's activity, the side opposed to God and Creation would not work so diligently to obscure and destroy all that is divine in man.