But without deeper reflection one knows from daily life that one exists for other people--first of all for those upon whose smiles and well-being our own happiness is wholly dependent, and then for the many, unknown to us, to whose destinies we are bound by the ties of sympathy.

The solution to this problem lies in the heart of mankind.

Betterment of conditions the world over is not essentially dependent on scientific knowledge but on the fulfillment of human traditions and ideals.

You can never solve a problem on the level on which it was created.

Assumptions are made and most assumptions are wrong.

Intelligence is not the ability to store information, but to know where to find it.

People are like bicycles. They can keep their balance only as long as they keep moving.