Behind their dark glass, the mad own nothing.

Morality is seldom a safe guide for human conduct.

A word of advice. If, as a young man, student, you are tormented by a desire for women, it is best to get out into the fresh air as much as possible.

The body, then, has a mind of its own. It must follow, then, that the Mind has a body of its own, even if it’s like nothing that we can see around us, or have ever seen.

On the whole, I think you should write biographies of those you admire and respect, and novels about human beings who you think are sadly mistaken.

More than that, I believe that the grass is green because green is restful to the human eye, that the sky is blue to give us an idea of the infinite. And that blood is red so that murder will be more easily detected and criminals will be brought to justice. Yes, and I believe that I shall live forever, but I shall live without reason.

Helping other people is a drug so dangerous that there is no cure short of total abstention.