Opinion is the medium between knowledge and ignorance.

Evil being the root of mystery, pain is the root of knowledge.

If you're not learning while you're earning, you're cheating yourself out of the better portion of your compensation.

Science is what we have learned about how to keep from fooling ourselves.

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

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.

Knowledge is power. Information is liberating. Education is the premise of progress, in every society, in every family.

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

Real knowledge is to know the extent of one's ignorance.

Medicine is my lawful wife and literature my mistress; when I get tired of one, I spend the night with the other.

Intelligence plus character-that is the goal of true education.

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

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

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

Imagination is the source of every form of human achievement. And it's the one thing that I believe we are systematically jeopardizing in the way we educate our children and ourselves.

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

Industrialize or perish.

My weapon is literature

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

The great difficulty in education is to get experience out of ideas.

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