No power and no treasure can outweigh the extension of our knowledge.

The deepest sin against the human mind is to believe things without evidence.

There is one quality which one must possess to win, and that is definiteness of purpose, the knowledge of what one wants, and a burning desire to possess it.

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

The knowledge of all things is possible

Real learning comes about when the competitive spirit has ceased.

If you're not learning while you're earning, you're cheating yourself out of the better portion of your compensation.

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

To every action there is always an equal and opposite or contrary, reaction

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

Education is the ability to listen to almost anything without losing your temper or your self-confidence.

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

The man who is fond of books is usually a man of lofty thought, and elevated opinions.

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

Books are as useful to a stupid person as a mirror is useful to a blind person.

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

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

Knowledge, Action, Devotion are complementary to each other.

Reading furnishes the mind only with materials of knowledge; it is thinking that makes what we read ours.

I decided to teach because I think that any person who studies philosophy has to be involved actively.

Evil being the root of mystery, pain is the root of knowledge.