Evil being the root of mystery, pain is the root of knowledge.
If I could explain it to the average person, I wouldn't have been worth the Nobel Prize.
If you're teaching today what you were teaching five years ago, either the field is dead or you are.
I do not know how to teach philosophy without becoming a disturber of the peace.
The most important part of teaching is to teach what it is to know.
There is one quality which one must possess to win, and that is definiteness of purpose, the knowledge of what one wants, and a burning desire to possess it.
Education is a system of imposed ignorance.
Show me a family of readers, and I will show you the people who move the world.
A child educated only at school is an uneducated child.
Dare to think for yourself.
The fullness of knowledge only comes through the awareness of ignorance.
Education is an admirable thing, but it is well to remember from time to time that nothing that is worth knowing can be taught.
No power and no treasure can outweigh the extension of our knowledge.
Physics is like sex: sure, it may give some practical results, but that's not why we do it.
If help and salvation are to come, they can only come from the children, for the children are the makers of men.
It took us three years to build the NeXT computer. If we'd given customers what they said they wanted, we'd have built a computer they'd have been happy with a year after we spoke to them - not something they'd want now.
The first principle is that you must not fool yourself and you are the easiest person to fool.
Knowing is not enough; we must apply. Willing is not enough; we must do.
Action not backed by knowledge and knowledge not translatable into action, both can not stand the test of time.
Reading furnishes the mind only with materials of knowledge; it is thinking that makes what we read ours.
Seek knowledge from the cradle to the grave.