Nothing is unthinkable, nothing impossible to the balanced person, provided it comes out of the needs of life and is dedicated to life's further development.

The cycle of the machine is now coming to an end. Man has learned much in the hard discipline and the shrewd, unflinching grasp of practical possibilities that the machine has provided in the last three centuries: but we can no more continue to live in the world of the machine than we could live successfully on the barren surface of the moon.

A man of courage never needs weapons, but he may need bail.

Only when love takes the lead will the earth, and life on earth, be safe again. And not until then.

Trend is not destiny.

The way people in democracies think of the government as something different from themselves is a real handicap. And, of course, sometimes the government confirms their opinion.

Genuine [economic] value lies in the power to sustain or enrich life