It isn't what we don't know that gives us trouble, it's what we know that ain't so.

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

If I could explain it to the average person, I wouldn't have been worth the Nobel Prize.

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

Necessity is the mother of invention.

A little knowledge is a dangerous thing. So is a lot.

Although modesty is natural to man, it is not natural to children. Modesty only begins with the knowledge of evil.

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.

Education is the kindling of a flame, not the filling of a vessel.

Liberty without Learning is always in peril and Learning without Liberty is always in vain.

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

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

God created man in His own image, says the Bible; philosophers reverse the process: they create God in theirs.

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

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

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

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

Reading without reflecting is like eating without digesting.

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

Study hard what interests you the most in the most undisciplined, irreverent and original manner possible.

Many much-learned men have no intelligence.