All knowledge that the world has ever received comes from the mind; the infinite library of the universe is in our own mind.

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

Industrialize or perish.

There is one quality which one must possess to win, and that is definiteness of purpose, the knowledge of what one wants, and a burning desire to possess it.

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.

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

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

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

Free the child's potential, and you will transform him into the world.

What is freedom of expression? Without the freedom to offend, it ceases to exist.

Education is a system of imposed ignorance.

Education is our passport to the future, for tomorrow belongs to the people who prepare for it today.

The fullness of knowledge only comes through the awareness of ignorance.

The only good is knowledge and the only evil is ignorance.

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

Study without desire spoils the memory, and it retains nothing that it takes in.

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

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

The highest result of education is tolerance.

Imagination is the source of every form of human achievement. And it's the one thing that I believe we are systematically jeopardizing in the way we educate our children and ourselves.

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