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

What is freedom of expression? Without the freedom to offend, it ceases to exist.

Free the child's potential, and you will transform him into the world.

Science is a rising force, It is creating a new world about us. It needs to be watched and pressed into service, and in any case, it would be courting disaster to ignore it.

Education is a system of imposed ignorance.

It is better to know how to learn than to know.

Books! I dunno if I ever told you this, but books are the greatest gift one person can give another.

I have just three things to teach: simplicity, patience, compassion. These three are your greatest treasures.

Imagination is more important than knowledge.

It is beyond a doubt that all our knowledge begins with experience.

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

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

A man who has never gone to school may steal a freight car; but if he has a university education, he may steal the whole railroad.

The progressive development of man is vitally dependent on invention.

The most savage controversies are those about matters as to which there is no good evidence either way.

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

With educated people, I suppose, punctuation is a matter of rule; with me it is a matter of feeling. But I must say I have great respect for the semi-colon; it's a useful little chap.

The man who does not read good books has no advantage over the man who can't read them.

The delight of opening a new pursuit, or a new course of reading, imparts the vivacity and novelty of youth even to old age.

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

The more I read, the more I acquire, the more certain I am that I know nothing.