The recurrent problem of civilization is to define the male role satisfactorily enough ... so that the male may in the course of his life reach a solid sense of irreversible achievement, of which his childhood knowledge of the satisfactions of child-bearing have given him a glimpse. In the case of women, it is only necessary that they be permitted by the given social arrangements to fulfil their biological role, to attain this sense of irreversible achievement. If women are to be restless and questing, even in the face of child-bearing, they must be made so through education.... Each culture--in its own way--has developed forms that will make men satisfied in their constructive activities without distorting their sure sense of their masculinity. Fewer cultures have yet found ways in which to give women a divine discontent that will demand other satisfactions than those of child-bearing.