I don't believe in personal immortality; the only way I expect to have some version of such a thing is through my books.

Experimentation is the least arrogant method of gaining knowledge. The experimenter humbly asks a question of nature.

People think of education as something that they can finish.

There are no nations! There is only humanity. And if we don't come to understand that right soon, there will be no nations, because there will be no humanity.

It has been my philosophy of life that difficulties vanish when faced boldly.

Humanists recognize that it is only when people feel free to think for themselves, using reason as their guide, that they are best capable of developing values that succeed in satisfying human needs and serving human interests.

If knowledge can create problems, it is not through ignorance that we can solve them.