Know what you are talking about.

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

One test of the correctness of educational procedure is the happiness of the child.

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

The real solution lies in a world in which charity will have become unnecessary.

The reading of all good books is like conversation with the finest men of past centuries.

Industrialize or perish.

To every action there is always an equal and opposite or contrary, reaction

Words can be like X-rays if you use them properly - they'll go through anything. You read and you?re pierced.

An investment in knowledge pays the best interest.

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

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

There is no authority who decides what is a good idea.

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.

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.

When you know better you do better.

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.

For a successful technology, reality must take precedence over public relations, for Nature cannot be fooled.

Science is what we have learned about how to keep from fooling ourselves.

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