The reading of all good books is like conversation with the finest men of past centuries.
I cannot live without books.
You can never learn less, you can only learn more.
Investigate, educate and organize.
If there were no bad people, there would be no good lawyers.
Evil being the root of mystery, pain is the root of knowledge.
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.
Seek knowledge from the cradle to the grave.
A little knowledge is a dangerous thing. So is a lot.
If one cannot enjoy reading a book over and over again, there is no use in reading it at all.
Knowledge becomes evil if the aim be not virtuous.
In mathematics you don't understand things. You just get used to them.
Science is what we have learned about how to keep from fooling ourselves.
It is not enough for the teacher to love the child. She must first love and understand the universe. She must prepare herself, and truly work at it.
Don't worry that children never listen to you; worry that they are always watching you.
Reading furnishes the mind only with materials of knowledge; it is thinking that makes what we read ours.
The books that the world calls immoral are books that show the world its own shame.
Human behavior flows from three main sources: desire, emotion, and knowledge
All knowledge that the world has ever received comes from the mind; the infinite library of the universe is in our own mind.
Don't learn to do, but learn in doing.
I do not know how to teach philosophy without becoming a disturber of the peace.