There is only one good, knowledge, and one evil, ignorance.

Be as you wish to seem.

The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge.

Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world.

There are two things a person should never be angry at, what they can help, and what they cannot.

There's no one thing that's true. It's all true.

The most important knowledge is that which guides the way you lead your life.

I cannot teach anybody anything. I can only make them think.

Strong minds discuss ideas, average minds discuss events, weak minds discuss people