The world in which we live is the only world about which our senses can testify.

Nations have recently been led to borrow billions for war; no nation has ever borrowed largely for education... no nation is rich enough to pay for both war and civilization. We must make our choice; we cannot have both.

The student is to collect and evaluate facts. The facts are locked up in the patient.

You have had your last bad meal. But, you have also heard your last honest compliment, and you have lost your last true friend.

Mathematicians, like cows in the dark, all look alike to me.

There are men who teach best by not teaching at all.

At no period of [Michael Faraday's] unmatched career was he interested in utility. He was absorbed in disentangling the riddles of the universe, at first chemical riddles, in later periods, physical riddles. As far as he cared, the question of utility was never raised. Any suspicion of utility would have restricted his restless curiosity. In the end, utility resulted, but it was never a criterion to which his ceaseless experimentation could be subjected.