Duty is what no-one else will do at the moment.

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.

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.

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

It's very good for an idea to be commonplace. The important thing is that a new idea should develop out of what is already there so that it soon becomes an old acquaintance. Old acquaintances aren't by any means always welcome, but at least one can't be mistaken as to who or what they are.

Experiences aren't given to us to be 'got over,' otherwise they would hardly be experiences.

I believe that people should write biographies only about people they love, or understand, or both. Novels, on the other hand, are often better if they're about people the writer doesn't like very much.