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

Some of us learn control, more or less by accident. The rest of us go all our lives not even understanding how it is possible, and blaming our failure on being born the wrong way.

In a world of complete economic equality, you get and keep the affections you deserve. You can't buy love with gifts or favors, you can't hold love by raising an inadequate child, and you can't be secure in love by serving as a good scrub woman or a good provider.

The real question is not whether machines think but whether men do. The mystery which surrounds a thinking machine already surrounds a thinking man.

I've often said that my rats have taught me much more than I've taught them.

Behavior is determined by its consequences.

Those who have had anything useful to say have said it far too often, and those who have had nothing to say have been no more reticent.