I am indebted to my father for living, but to my teacher for living well.

I had rather excel others in the knowledge of what is excellent, than in the extent of my power and dominion

Knowledge becomes evil if the aim be not virtuous.

Although modesty is natural to man, it is not natural to children. Modesty only begins with the knowledge of evil.

They say a little knowledge is a dangerous thing, but it's not one half so bad as a lot of ignorance.

If you're teaching today what you were teaching five years ago, either the field is dead or you are.

A little knowledge that acts is worth infinitely more than much knowledge that is idle.

I do not know how to teach philosophy without becoming a disturber of the peace.

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.

If one cannot enjoy reading a book over and over again, there is no use in reading it at all.

Educate the children and it won't be necessary to punish the men.

Common sense is the collection of prejudices acquired by age eighteen.

Books! I dunno if I ever told you this, but books are the greatest gift one person can give another.

Those who fail to learn the lessons of history are doomed to repeat them.

The more I read, the more I acquire, the more certain I am that I know nothing.

The deepest sin against the human mind is to believe things without evidence.

The highest activity a human being can attain is learning for understanding, because to understand is to be free.

One test of the correctness of educational procedure is the happiness of the child.

If help and salvation are to come, they can only come from the children, for the children are the makers of men.

I have no special talents. I am only passionately curious.

Study hard what interests you the most in the most undisciplined, irreverent and original manner possible.