Overpopulation in various countries has become a serious threat to the health of people and a grave obstacle to any attempt to organise peace on this planet

I'm not a genius. I'm just passionately curious.

We must recognize what in our accepted tradition is damaging to our fate and dignity-and shape our lives accordingly.

The physicist's greatest tool is his wastebasket.

Lasting harmony with a woman (was) an undertaking in which I twice failed rather disgracefully.

The greatest activity of which man is capable: Opening up yet another fragment of the frontier of beauty.

A religious person is devout in the sense that he has no doubt about the significance of those superpersonal objects and goals which neither require nor are capable of rational foundation