PAUL TILLICH'S CONCEPT OF MAN?

From his text:

Man experiences himself as having a world to which he belongs, and it is from the analysis of this polar relationship between man and the world that the basic ontological structure is derived. Since man is estranged from nature, and is unable to understand it in the way he understands man—he does not know what men’s behavior means to men—the principles which constitute the universe must be sought in man himself.