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 books that the world calls immoral are books that show the world its own shame.

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

If one cannot enjoy reading a book over and over again, there is no use in reading it at all.

To every action there is always an equal and opposite or contrary, reaction

I am so clever that sometimes I don't understand a single word of what I am saying.

Suddenly degrees aren't worth anything. Isn't that true? When I was a student, if you had a degree, you had a job. If you didn't have a job it's because you didn't want one. And I didn't want one, frankly.

Learn as though you would never be able to master it; hold it as though you would be in fear of losing it.

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.

Make it a rule never to give a child a book you would not read yourself.

Opinion is the medium between knowledge and ignorance.

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

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

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.

It is better to know how to learn than to know.

Necessity is the mother of invention.

An investment in knowledge pays the best interest.

Education is an admirable thing, but it is well to remember from time to time that nothing that is worth knowing can be taught.

Education is the kindling of a flame, not the filling of a vessel.

Imagination is more important than knowledge.

If help and salvation are to come, they can only come from the children, for the children are the makers of men.