As to the human race. There are many pretty and winning things about the human race. It is perhaps the poorest of all the inventions of all the gods but it has never suspected it once. There is nothing prettier than its naive and complacent appreciation of itself. It comes out frankly and proclaims without bashfulness or any sign of a blush that it is the noblest work of God. It has had a billion opportunities to know better, but all signs fail with this ass. I could say harsh things about it but I cannot bring myself to do it-it is like hitting a child.

We should be careful to get out of an experience only the wisdom that is in it and stop there lest we be like the cat that sits down on a hot stove lid. She will never sit down on a hot stove lid again and that is well but also she will never sit down on a cold one anymore.

Always obey your parents. When they are present. This is the best policy in the long run. Because if you don't, they will make you. Most parents think they know better than you do, and you can generally make more by humoring that superstition than you can by acting on your own better judgment.

I didn't have time to write a short letter, so I wrote a long one instead.

Evolution is a blind giant who rolls a snowball down a hill. The ball is made of flakes-circumstances. They contribute to the mass without knowing it. They adhere without intention, and without foreseeing what is to result. When they see the result they marvel at the monster ball and wonder how the contriving of it came to be originally thought out and planned. Whereas there was no such planning, there was only a law: the ball once started, all the circumstances that happened to lie in its path would help to build it, in spite of themselves.

You cannot have a theory without principles. Principles is another name for prejudices.

Had double chins all the way down to his stomach.