If the facts don't fit the theory, change the facts.

I am so clever that sometimes I don't understand a single word of what I am saying.

God created man in His own image, says the Bible; philosophers reverse the process: they create God in theirs.

As we acquire more knowledge, things do not become more comprehensible but more mysterious.

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

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

A little knowledge is a dangerous thing. So is a lot.

A man who has never gone to school may steal a freight car; but if he has a university education, he may steal the whole railroad.

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

If you want the present to be different from the past, study the past.

Necessity is the mother of invention.

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

In mathematics you don't understand things. You just get used to them.

The fullness of knowledge only comes through the awareness of ignorance.

Imagination is more important than knowledge.

The task of a writer is not to solve the problem but to state the problem correctly.

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

The most savage controversies are those about matters as to which there is no good evidence either way.

Study without desire spoils the memory, and it retains nothing that it takes in.

What is now proved was once only imagined.

The schools ain't what they used to be and never was.