The progressive development of man is vitally dependent on invention.

The ability to observe without evaluating is the highest form of intelligence.

Knowing is not enough; we must apply. Willing is not enough; we must do.

When you know better you do better.

Many much-learned men have no intelligence.

I prefer the company of peasants because they have not been educated sufficiently to reason incorrectly.

A little knowledge that acts is worth infinitely more than much knowledge that is idle.

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

A witty saying proves nothing.

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

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

You can never learn less, you can only learn more.

If I have seen further it is by standing on the shoulders of Giants.

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

A cynic is a man who knows the price of everything, and the value of nothing.

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.

The real solution lies in a world in which charity will have become unnecessary.

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

Knowledge becomes evil if the aim be not virtuous.

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.

Language is courage: the ability to conceive a thought, to speak it, and by doing so to make it true.