Scientists do not believe in fundamental and absolute certainties. For the scientist, certainty is never an end, but a search; not the ordering of certainty, but its exploration. For the scientist, certainty represents the highest degree of probability.

By virtue of being born to humanity, every human being has a right to the development and fulfillment of his potentialities as a human being.

It is work, work that one delights in, that is the surest guarantor of happiness. But even here it is a work that has to be earned by labor in one's earlier years. One should labor so hard in youth that everything one does subsequently is easy by comparison.

The evidence indicates that woman is, on the whole, biologically superior to man.

Hatred is love frustrated.

Man is the only 150 pound nonlinear servomechanism that can be wholly reproduced by unskilled labor.

No one should be required to see America for the first time.