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

There is nothing more notable in Socrates than that he found time, when he was an old man, to learn music and dancing, and thought it time well spent.

Knowledge is of two kinds. We know a subject ourselves, or we know where we can find information upon it.

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

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

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

Words can be like X-rays if you use them properly - they'll go through anything. You read and you?re pierced.

Integrity without knowledge is weak and useless, and knowledge without integrity is dangerous and dreadful.

It is what you read when you don't have to that determines what you will be when you can't help it.

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

No man's knowledge here can go beyond his experience.

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

There is nothing more awful, insulting, and depressing than banality.

What sculpture is to a block of marble, education is to a human soul.

Reading is to the mind what exercise is to the body.

Just when I thought there wasn't room enough for another thought in my head, I had this great idea.

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

I like poems you can tack all over with a hammer and there are no hollow places.

I cannot live without books.

Any knowledge that doesn't lead to new questions quickly dies out: it fails to maintain the temperature required for sustaining life.

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