If you treat your children at home in the same way you treat your animals in the lab, your wife will scratch your eyes out. My wife ferociously warned me against experimenting on her babies.

The test of a man is: does he bear apples? Does he bear fruit?

When all you own is a hammer, every problem starts looking like a nail.

Common sense means living in the world as it is today; but creative people are people who don't want the world as it is today but want to make another world.

One cannot choose wisely for a life unless he dares to listen to himself, his own self, at each moment of his life.

Every person is, in part, 'his own project' and makes himself.

It isn't normal to know what we want. It is a rare and difficult psychological achievement.