“We are dealing with two fundamental human and cosmic forces in man and in the universal world: the movement of the descent of the Spirit into the manifest material world (creation, incarnation), and the movement of ascent and return (spiritualization) to the Source that is Spirit, Being itself. And it is man who is destined to stand in the middle as a bridge between these two intrinsically opposing forces—in Christian language, on the Cross...”
from What Is God?