A human lifespan is less than a thousand months long. You need to make some time to think how to live it.

Nothing is truly unnatural, because everything that exists, including human intelligence, is a product of nature. If human intelligence can devise ways for the genes from two men to result in a child, their doing so is an entirely natural event.

The wise say that our failure is to form habits: for habit is the mark of a stereotyped world.

It doesn't have to be the Grand Canyon, it could be a city street, it could be the face of another human being - Everything is full of wonder.

Religions survive mainly because they brainwash the young.

I do not believe that there are any such things as gods and goddesses, for exactly the same reasons as I do not believe there are fairies, goblins or sprites, and these reasons should be obvious to anyone over the age of ten.

Misuse of reason might yet return the world to pre-technological night; plenty of religious zealots hunger for just such a result, and are happy to use the latest technology to effect it.