Know what you are talking about.

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

What sculpture is to a block of marble, education is to a human soul.

Any sufficiently advanced technology is indistinguishable from magic.

Imagination is more important than knowledge.

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

Don't learn to do, but learn in doing.

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

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

In order to stave off covetouness, greed, and spite, citizens world over must be educated.

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

There is nothing more awful, insulting, and depressing than banality.

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

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

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

An investment in knowledge pays the best interest.

The knowledge of all things is possible

My weapon is literature

Real knowledge is to know the extent of one's ignorance.

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

A witty saying proves nothing.