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

Knowledge is of two kinds. We know a subject ourselves, or we know where we can find information upon it.

Common sense is the collection of prejudices acquired by age eighteen.

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

The first principle is that you must not fool yourself and you are the easiest person to fool.

Technology is just a tool. In terms of getting the kids working together and motivating them, the teacher is the most important.

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

Show me a family of readers, and I will show you the people who move the world.

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

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

The task of a writer is not to solve the problem but to state the problem correctly.

Learning never exhausts the mind.

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

Education is an admirable thing, but it is well to remember from time to time that nothing that is worth knowing can be taught.

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

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

Those who fail to learn the lessons of history are doomed to repeat them.

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

I am so clever that sometimes I don't understand a single word of what I am saying.

A spirit of national masochism prevails, encouraged by an effete corps of impudent snobs who characterize themselves as intellectuals.

Human behavior flows from three main sources: desire, emotion, and knowledge