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

Don't learn to do, but learn in doing.

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

Opinion is the medium between knowledge and ignorance.

All sciences are vain and full of errors that are not born of Experience, the mother of all Knowledge.

That men do not learn very much from the lessons of history is the most important of all the lessons that history has to teach.

Know what you are talking about.

Learning never exhausts the mind.

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

Just because I don't care doesn't mean I don't understand.

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.

We could never learn to be brave and patient, if there were only joy in the world

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

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

Investigate, educate and organize.

Men are born ignorant, not stupid. They are made stupid by education.

Investigate, educate and organize the country must progress, productive works and industries are the main avenues at present next to education for the advancement of the country

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 only good is knowledge and the only evil is ignorance.

A thought is an idea in transit.

Reading furnishes the mind only with materials of knowledge; it is thinking that makes what we read ours.