A disappointment is not generally an oversight. It might just be the best one can do the situation being what it is. The genuine error is to quit attempting.

A failure is not always a mistake, it may simply be the best one can do under the circumstances. The real mistake is to stop trying.

Must we wait for selection to solve the problems of overpopulation, exhaustion of resources, pollution of the environment and a nuclear holocaust, or can we take explicit steps to make our future more secure? In the latter case, must we not transcend selection?

Science is a willingness to accept facts even when they are opposed to wishes.

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.

The world's a poor standard. any society which is free of hunger and violence looks bright against that background.

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