Liberty without Learning is always in peril and Learning without Liberty is always in vain.
The whole of science is nothing more than a refinement of everyday thinking.
Reading furnishes the mind only with materials of knowledge; it is thinking that makes what we read ours.
Necessity is the mother of invention.
Physics is like sex: sure, it may give some practical results, but that's not why we do it.
You can never learn less, you can only learn more.
In mathematics you don't understand things. You just get used to them.
For a successful technology, reality must take precedence over public relations, for Nature cannot be fooled.
What sculpture is to a block of marble, education is to a human soul.
You can never be overdressed or overeducated.
It is what you read when you don't have to that determines what you will be when you can't help it.
The secret of life is not enjoyment but education through experience.
Learning never exhausts the mind.
Medicine is my lawful wife and literature my mistress; when I get tired of one, I spend the night with the other.
Educate the children and it won't be necessary to punish the men.
My alma mater was books, a good library.... I could spend the rest of my life reading, just satisfying my curiosity.
Make it a rule never to give a child a book you would not read yourself.
A thought is an idea in transit.
My weapon is literature
Courage, conviction and confidence.
The man who is fond of books is usually a man of lofty thought, and elevated opinions.