The only good is knowledge and the only evil is ignorance.

Study without desire spoils the memory, and it retains nothing that it takes in.

It is what you read when you don't have to that determines what you will be when you can't help it.

Knowledge becomes evil if the aim be not virtuous.

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

The man who does not read good books has no advantage over the man who can't read them.

I prefer the company of peasants because they have not been educated sufficiently to reason incorrectly.

Science is what we have learned about how to keep from fooling ourselves.

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

There is nothing more notable in Socrates than that he found time, when he was an old man, to learn music and dancing, and thought it time well spent.

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

Although modesty is natural to man, it is not natural to children. Modesty only begins with the knowledge of evil.

My weapon is literature

Books are for people who wish they were somewhere else.

No man's knowledge here can go beyond his experience.

The secret of life is not enjoyment but education through experience.

Knowledge, Action, Devotion are complementary to each other.

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

Better know nothing than half-know many things.

The idea is to try to give all the information to help others to judge the value of your contribution; not just the information that leads to judgment in one particular direction or another.

I do not know how to teach philosophy without becoming a disturber of the peace.