We admire people to the extent that we cannot explain what they do, and the word 'admire' then means 'marvel at.'

I may say that the only differences I expect to see revealed between the behavior of the rat and man (aside from enormous differences of complexity) lie in the field of verbal behavior.

At this very moment enormous numbers of intelligent men and women of goodwill are trying to build a better world. But problems are born faster than they can be solved.

If the world is to save any part of its resources for the future, it must reduce not only consumption but the number of consumers.

A piece of music is an experience to be taken by itself.

Except when physically restrained, a person is least free or dignified when he is under threat of punishment, and unfortunately most people often are.

Education is what survives when what has been learned has been forgotten.