Learning never exhausts the mind.
The most important part of teaching is to teach what it is to know.
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 a rising force, It is creating a new world about us. It needs to be watched and pressed into service, and in any case, it would be courting disaster to ignore it.
Science is a way of thinking much more than it is a body of knowledge.
All knowledge that the world has ever received comes from the mind; the infinite library of the universe is in our own mind.
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.
A little knowledge that acts is worth infinitely more than much knowledge that is idle.
If there were no bad people, there would be no good lawyers.
A man who has never gone to school may steal a freight car; but if he has a university education, he may steal the whole railroad.
The schools ain't what they used to be and never was.
Education is the ability to listen to almost anything without losing your temper or your self-confidence.
Medicine is my lawful wife and literature my mistress; when I get tired of one, I spend the night with the other.
My weapon is literature
There is no authority who decides what is a good idea.
Those who fail to learn the lessons of history are doomed to repeat them.
I have no special talents. I am only passionately curious.
If the facts don't fit the theory, change the facts.
You can never learn less, you can only learn more.
Education is an admirable thing, but it is well to remember from time to time that nothing that is worth knowing can be taught.
Knowledge, Action, Devotion are complementary to each other.