A little knowledge is a dangerous thing. So is a lot.

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.

Physics is like sex: sure, it may give some practical results, but that's not why we do it.

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

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

Reading without reflecting is like eating without digesting.

I cannot teach anybody anything. I can only make them think

A witty saying proves nothing.

It is possible to fly without motors, but not without knowledge and skill.

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

The man who does not read good books has no advantage over the man who can't read them.

Educate the children and it won't be necessary to punish the men.

Real learning comes about when the competitive spirit has ceased.

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

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

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

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

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.

If you want the present to be different from the past, study the past.

Action not backed by knowledge and knowledge not translatable into action, both can not stand the test of time.

Science is a rising force, It is creating a new world about us. It needs to be watched and pressed into service, and in any case, it would be courting disaster to ignore it.