On the other hand, the concept owes its meaning and its justification exclusively to the totality of the sense impressions which we associate with it.

We cannot get to where we dream of being tomorrow unless we change our thinking today.

Conviction is a good motive, but a bad judge.

More and more I come to value charity and love of one's fellow being above everything else...All our lauded technological progress-our very civilization-is like the axe in the hand of the pathological criminal.

The stakes are immense, the task colossal, the time is short. But we may hope - we must hope - that man's own creation, man's own genius, will not destroy him.

The heart says yes, but the mind says no.

I like neither new clothes nor new kinds of food.