The loving touch, like music, often utters the things that cannot be spoken.

Girls marry for love. Boys marry because of a chronic irritation that causes them to gravitate in the direction of objects with certain curvilinear properties.

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.

In teaching it is the method and not the content that is the message.

Human beings are the only creatures who are able to behave irrationally in the name of reason.

The world is so full of wonderful things we should all, if we were taught how to appreciate it, be far richer than kings.

The natural superiority of women is a biological fact, and a socially acknowledged reality.