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

When you know better you do better.

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

Just because I don't care doesn't mean I don't understand.

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

That men do not learn very much from the lessons of history is the most important of all the lessons that history has to teach.

Industrialize or perish.

It is not enough for the teacher to love the child. She must first love and understand the universe. She must prepare herself, and truly work at it.

The books that the world calls immoral are books that show the world its own shame.

Many much-learned men have no intelligence.

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

The schools ain't what they used to be and never was.

Imagination is more important than knowledge.

Civilization is a race between disaster and education.

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

Knowledge, Action, Devotion are complementary to each other.

Any sufficiently advanced technology is indistinguishable from magic.

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.

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

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

I have no special talents. I am only passionately curious.