I cannot live without books.

If I could explain it to the average person, I wouldn't have been worth the Nobel Prize.

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

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

The progressive development of man is vitally dependent on invention.

Words can be like X-rays if you use them properly - they'll go through anything. You read and you?re pierced.

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

He who would learn to fly one day must first learn to stand and walk and run and climb and dance; one cannot fly into flying.

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.

What we know is a drop, what we don't know is an ocean.

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

Opinion is the medium between knowledge and ignorance.

Evil being the root of mystery, pain is the root of knowledge.

There is no authority who decides what is a good idea.

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.

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

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

My weapon is literature

Liberty without Learning is always in peril and Learning without Liberty is always in vain.

Real learning comes about when the competitive spirit has ceased.

The idea is to try to give all the information to help others to judge the value of your contribution; not just the information that leads to judgment in one particular direction or another.