Don't worry that children never listen to you; worry that they are always watching you.
All knowledge that the world has ever received comes from the mind; the infinite library of the universe is in our own mind.
The direction in which education starts a man will determine his future in life
That men do not learn very much from the lessons of history is the most important of all the lessons that history has to teach.
Know what you are talking about.
It is what you read when you don't have to that determines what you will be when you can't help it.
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.
Knowledge is of two kinds. We know a subject ourselves, or we know where we can find information upon it.
My alma mater was books, a good library.... I could spend the rest of my life reading, just satisfying my curiosity.
Although modesty is natural to man, it is not natural to children. Modesty only begins with the knowledge of evil.
No man's knowledge here can go beyond his experience.
I am indebted to my father for living, but to my teacher for living well.
Evil being the root of mystery, pain is the root of knowledge.
Any sufficiently advanced technology is indistinguishable from magic.
They say a little knowledge is a dangerous thing, but it's not one half so bad as a lot of ignorance.
Opinion is the medium between knowledge and ignorance.
Just when I thought there wasn't room enough for another thought in my head, I had this great idea.
What we know is a drop, what we don't know is an ocean.
I cannot teach anybody anything. I can only make them think
No power and no treasure can outweigh the extension of our knowledge.
A child educated only at school is an uneducated child.