The progressive development of man is vitally dependent on invention.
Physics is like sex: sure, it may give some practical results, but that's not why we do it.
Don't learn to do, but learn in doing.
The more I read, the more I acquire, the more certain I am that I know nothing.
Education is a human right with immense power to transform. On its foundation rest the cornerstones of freedom, democracy and sustainable human development.
The ability to observe without evaluating is the highest form of intelligence.
It is what you read when you don't have to that determines what you will be when you can't help it.
Science is what we have learned about how to keep from fooling ourselves.
Action not backed by knowledge and knowledge not translatable into action, both can not stand the test of time.
Education is an admirable thing, but it is well to remember from time to time that nothing that is worth knowing can be taught.
I decided to teach because I think that any person who studies philosophy has to be involved actively.
Real learning comes about when the competitive spirit has ceased.
Opinion is the medium between knowledge and ignorance.
A spirit of national masochism prevails, encouraged by an effete corps of impudent snobs who characterize themselves as intellectuals.
The reading of all good books is like conversation with the finest men of past centuries.
I have just three things to teach: simplicity, patience, compassion. These three are your greatest treasures.
A cynic is a man who knows the price of everything, and the value of nothing.
Reading is to the mind what exercise is to the body.
Any knowledge that doesn't lead to new questions quickly dies out: it fails to maintain the temperature required for sustaining life.
There is no authority who decides what is a good idea.
Language is courage: the ability to conceive a thought, to speak it, and by doing so to make it true.