If you think your teacher is tough, wait until you get a boss. He doesn't have tenure.

Only put off until tomorrow what you are willing to die having left undone

No man ever achieved worthwhile success who did not, at one time or other, find himself with at least one foot hanging well over the brink of failure.

Workers of the world unite; you have nothing to lose but your chains.

A great secret of success is to go through life as a man who never gets used up.

You gain strength, courage and confidence by every experience in which you really stop to look fear in the face.... You must do the thing you think you cannot do.

Innovation distinguishes between a leader and a follower.

Lisa, if you don't like your job you don't strike. You just go in every day and do it really half-assed. That's the American way.

One can have no smaller or greater mastery than mastery of oneself.

If you aspire to the highest place, it is no disgrace to stop at the second, or even the third, place.

To know what people really think, pay regard to what they do, rather than what they say.

You've got to be very careful if you don't know where you're going, because you might not get there.

We don't know a millionth of one percent about anything.

I never did a day's work in my life. It was all fun.

Most people spend more time and energy going around problems than in trying to solve them.

Vision without execution is just hallucination.

If you aim at nothing, you will hit it every time.

If your business is only to sweep a crossing, remember it is your duty to make that crossing the best swept of the world.

I am easily satisfied with the very best.

The role of the artist is to ask questions, not answer them.

Nothing will work unless you do.