Knowing is not enough; we must apply. Willing is not enough; we must do.

Men are born ignorant, not stupid. They are made stupid by education.

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

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

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

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.

When you know better you do better.

Knowledge becomes evil if the aim be not virtuous.

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

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

A little knowledge is a dangerous thing. So is a lot.

Just because I don't care doesn't mean I don't understand.

Learning never exhausts the mind.

A little knowledge that acts is worth infinitely more than much knowledge that is idle.

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

Seek knowledge from the cradle to the grave.

Imagination is more important than knowledge.

I like poems you can tack all over with a hammer and there are no hollow places.

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

All knowledge that the world has ever received comes from the mind; the infinite library of the universe is in our own mind.

The highest activity a human being can attain is learning for understanding, because to understand is to be free.