The first idea the child must acquire is that of the difference between good and evil.

To educate a person in the mind but not in morals is to educate a menace to society.

If you want the present to be different from the past, study the past.

It is better to know how to learn than to know.

The progressive development of man is vitally dependent on invention.

What is now proved was once only imagined.

Medicine is my lawful wife and literature my mistress; when I get tired of one, I spend the night with the other.

Suddenly degrees aren't worth anything. Isn't that true? When I was a student, if you had a degree, you had a job. If you didn't have a job it's because you didn't want one. And I didn't want one, frankly.

The reading of all good books is like conversation with the finest men of past centuries.

Learn as though you would never be able to master it; hold it as though you would be in fear of losing it.

If the facts don't fit the theory, change the facts.

Never help a child with a task at which he feels he can succeed.

Knowing others is wisdom, knowing yourself is Enlightenment.

Reading is to the mind what exercise is to the body.

In mathematics you don't understand things. You just get used to them.

Study hard what interests you the most in the most undisciplined, irreverent and original manner possible.

If you can't explain it simply, you don't understand it well enough.

The highest result of education is tolerance.

Just when I thought there wasn't room enough for another thought in my head, I had this great idea.

The direction in which education starts a man will determine his future in life

The real solution lies in a world in which charity will have become unnecessary.