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

It isn't what we don't know that gives us trouble, it's what we know that ain't so.

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

The whole of science is nothing more than a refinement of everyday thinking.

I learned very early the difference between knowing the name of something and knowing something.

Learning gives creativity, Creativity leads to thinking, Thinking provides knowledge, Knowledge makes you great.

Suddenly degrees aren't worth anything. Isn't that true? When I was a student, if you had a degree, you had a job. If you didn't have a job it's because you didn't want one. And I didn't want one, frankly.

Reading furnishes the mind only with materials of knowledge; it is thinking that makes what we read ours.

Education is an admirable thing, but it is well to remember from time to time that nothing that is worth knowing can be taught.

The reading of all good books is like conversation with the finest men of past centuries.

Necessity is the mother of invention.

Books are for people who wish they were somewhere else.

Liberty without Learning is always in peril and Learning without Liberty is always in vain.

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

The secret of life is not enjoyment but education through experience.

It is beyond a doubt that all our knowledge begins with experience.

Opinion is the medium between knowledge and ignorance.

An investment in knowledge pays the best interest.

What is now proved was once only imagined.

Science is a way of thinking much more than it is a body of knowledge.

The idea is to try to give all the information to help others to judge the value of your contribution; not just the information that leads to judgment in one particular direction or another.