Knowing others is wisdom, knowing yourself is Enlightenment.
A little knowledge that acts is worth infinitely more than much knowledge that is idle.
Language is courage: the ability to conceive a thought, to speak it, and by doing so to make it true.
The only good is knowledge and the only evil is ignorance.
I prefer the company of peasants because they have not been educated sufficiently to reason incorrectly.
Physics is like sex: sure, it may give some practical results, but that's not why we do it.
My weapon is literature
The fullness of knowledge only comes through the awareness of ignorance.
Science is what we have learned about how to keep from fooling ourselves.
The first principle is that you must not fool yourself and you are the easiest person to fool.
It is what you read when you don't have to that determines what you will be when you can't help it.
If help and salvation are to come, they can only come from the children, for the children are the makers of men.
The progressive development of man is vitally dependent on invention.
The man who is fond of books is usually a man of lofty thought, and elevated opinions.
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.
I decided to teach because I think that any person who studies philosophy has to be involved actively.
Don't learn to do, but learn in doing.
Learning never exhausts the mind.
Human behavior flows from three main sources: desire, emotion, and knowledge
Industrialize or perish.
Knowing is not enough; we must apply. Willing is not enough; we must do.