Medicine is my lawful wife and literature my mistress; when I get tired of one, I spend the night with the other.

I think that kids have a greater capacity for processing things than we give them credit for.

The direction in which education starts a man will determine his future in life

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

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

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

Learn as though you would never be able to master it; hold it as though you would be in fear of losing it.

If the facts don't fit the theory, change the facts.

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

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

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

You can never learn less, you can only learn more.

The great difficulty in education is to get experience out of ideas.

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

Science is a way of thinking much more than it is a body of knowledge.

Science is not only a disciple of reason but, also, one of romance and passion.

The first idea the child must acquire is that of the difference between good and evil.

Integrity without knowledge is weak and useless, and knowledge without integrity is dangerous and dreadful.

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

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

When you know better you do better.