Those who fail to learn the lessons of history are doomed to repeat them.
The only true wisdom is in knowing you know nothing.
Dare to think for yourself.
For a successful technology, reality must take precedence over public relations, for Nature cannot be fooled.
Reading furnishes the mind only with materials of knowledge; it is thinking that makes what we read ours.
A little knowledge that acts is worth infinitely more than much knowledge that is idle.
Physics is like sex: sure, it may give some practical results, but that's not why we do it.
Reading is to the mind what exercise is to the body.
Free the child's potential, and you will transform him into the world.
If you can't explain it simply, you don't understand it well enough.
If help and salvation are to come, they can only come from the children, for the children are the makers of men.
In mathematics you don't understand things. You just get used to them.
No power and no treasure can outweigh the extension of our knowledge.
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.
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.
You can never learn less, you can only learn more.
Opinion is the medium between knowledge and ignorance.
I cannot live without books.
I have no special talents. I am only passionately curious.
Learn as though you would never be able to master it; hold it as though you would be in fear of losing it.
A child educated only at school is an uneducated child.