The schools ain't what they used to be and never was.

Integrity without knowledge is weak and useless, and knowledge without integrity is dangerous and dreadful.

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

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

What is now proved was once only imagined.

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

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.

Any man who reads too much and uses his own brain too little falls into lazy habits of thinking.

You can never learn less, you can only learn more.

If I have seen further it is by standing on the shoulders of Giants.

Seek knowledge from the cradle to the grave.

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

Science is not only a disciple of reason but, also, one of romance and passion.

Make it a rule never to give a child a book you would not read yourself.

I cannot live without books.

My weapon is literature

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

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

It is possible to fly without motors, but not without knowledge and skill.

Physics is like sex: sure, it may give some practical results, but that's not why we do it.