Live and act within the limit of your knowledge and keep expanding it to the limit of your life.

The more you learn, the more you know that you know nothing.

A house can have integrity, just like a person.

The causes of illusions are not pretty to discover. They're either vicious or tragic.

Now look at me! Take a good look! I was born and I knew I was alive and I knew what I wanted. What do you think is alive in me? Why do you think I'm alive? Because I have a stomach and eat and digest the food? Because I breathe and work and produce more food to digest? Or because I know what I want, and that something which knows how to want—isn't that life itself? And who—in this damned universe—who can tell me why I should live for anything but for that which I want?

The [U.S.] Constitution is a limitation on the government, not on private individuals ... it does not prescribe the conduct of private individuals, only the conduct of the government ... it is not a charter for government power, but a charter of the citizen's protection against the government.

the important consideration is not your opponents, but yourself. It is bad to scream at them, not because it hurts them, they ought to be hurt, but because it hurts you. Anger is a form of recognition. It amounts to admitting that those people are important to you and that they have the power to hurt you. Actually, they haven't.