The man who does not read good books has no advantage over the man who can't read them.

The progressive development of man is vitally dependent on invention.

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

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

I don't look on poetry as closed works. I feel they're going on all the time in my head and I occasionally snip off a length.

Better know nothing than half-know many things.

Many much-learned men have no intelligence.

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

The white man is very clever. He came quietly and peaceably with his religion. We were amused at his foolishness and allowed him to stay. Now he has won our brothers, and our clan can no longer act like one. He has put a knife on the things that held us together and we have fallen apart.

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

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

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

I had rather excel others in the knowledge of what is excellent, than in the extent of my power and dominion

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

If you can't explain it simply, you don't understand it well enough.

For a successful technology, reality must take precedence over public relations, for Nature cannot be fooled.

The first principle is that you must not fool yourself and you are the easiest person to fool.

Patience is a virtue, and I'm learning patience. It's a tough lesson.

The knowledge of all things is possible

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

Knowledge, Action, Devotion are complementary to each other.