Dancing is the only activity in which almost all ages and both sexes participate.

in all cultures, human beings - in order to be human - must understand the nonhuman.

Mothers are a biological necessity; fathers are a social invention

If we are to give our utmost effort and skill and enthusiasm, we must believe in ourselves, which means believing in our past and in our future, in our parents and in our children, in that particular blend of moral purpose and practical inventiveness which is the American character.

Because our civilization is woven of so many diverse strands, the ideas which any one group accepts will be found to contain numerous contradictions.

Life is in one of its smoother phases ... I've no responsibilities in the world except friends and students and cherishing the life of the world -- and the belief that there is enough love to go round.

We are at a point in history where a proper attention to space, and especially near space, may be absolutely crucial in bringing the world together.