Information is not knowledge. The only source of knowledge is experience.
Imagination is more important than knowledge.
There are only two ways to live your life. One is as though nothing is a miracle. The other is as though everything is a miracle.
Insanity is doing the same thing over and over again and expecting different results.
Intellectuals solve problems, geniuses prevent them.

If you can’t explain it simply, you don’t understand it well enough.
It is harder to crack prejudice than an atom.
Two things are infinite: the universe and human stupidity; and I’m not sure about the the universe.
The hardest thing to understand in the world is the income tax.
We cannot solve our problems with the same thinking we used when we created them.
Education is what remains after one has forgotten what one has learned in school.
The world is a dangerous place to live; not because of the people who are evil, but because of the people who don’t do anything about it.