Never help a child with a task at which he feels he can succeed.

Physics is like sex: sure, it may give some practical results, but that's not why we do it.

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

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

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

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

I cannot live without books.

Know what you are talking about.

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

No man's knowledge here can go beyond his experience.

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

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

The knowledge of all things is possible

What we know is a drop, what we don't know is an ocean.

All sciences are vain and full of errors that are not born of Experience, the mother of all Knowledge.

Necessity is the mother of invention.

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

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

Any sufficiently advanced technology is indistinguishable from magic.

To read is to fly: it is to soar to a point of vantage which gives a view over wide terrains of history, human variety, ideas, shared experience and the fruits of many inquiries.

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