In mathematics you don't understand things. You just get used to them.

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

Courage, conviction and confidence.

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

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

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

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

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.

Science is a way of thinking much more than it is a body of knowledge.

When I am attacked by gloomy thoughts, nothing helps me so much as running to my books. They quickly absorb me and banish the clouds from my mind.

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

If the facts don't fit the theory, change the facts.

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

My weapon is literature

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

Most people have never learned that one of the main aims in life is to enjoy it.

Technology is just a tool. In terms of getting the kids working together and motivating them, the teacher is the most important.

Don't worry that children never listen to you; worry that they are always watching you.

A man who has never gone to school may steal a freight car; but if he has a university education, he may steal the whole railroad.

The man who is fond of books is usually a man of lofty thought, and elevated opinions.

If there were no bad people, there would be no good lawyers.