The difference between stupidity and genius is that genius has its limits.

Just remember, once you're over the hill you begin to pick up speed.

When you learn, teach, when you get, give.

Wisdom is not the product of schooling, but of the lifelong attempt to acquire it.

Intelligence is the ability to adapt to change.

There are four ways, and only four ways, in which we have contact with the world. We are evaluated and classified by these four contacts: what we do, how we look, what we say, and how we say it.

The weak can never forgive. Forgiveness is the attribute of the strong.

The most courageous act is still to think for yourself. Aloud.

Beer: The cause of, and solution to, all of life's problems.

As the soft yield of water cleaves obstinate stone, So to yield with life solves the insolvable: To yield, I have learned, is to come back again.

Knowing yourself is the beginning of all wisdom.

He alone is free who lives with free consent under the entire guidance of reason.

Everything excellent is as difficult as it is rare.

If we do not lay out ourselves in the service of mankind whom should we serve?

Do not say a little in many words, but a great deal in few!

I wanted to change the world. But I have found that the only thing one can be sure of changing is oneself.

How often I found where I should be going only by setting out for somewhere else.

It is neither good nor bad, but thinking makes it so.

The more skilled you are at something, the worse you are at it when showing someone.

I think about the meaning of pain. Pain is personal. It really belongs to the one feeling it. Probably the only thing that is your own. I like mine.

A good teacher protects his pupils from his own influence.