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

When things go wrong don't go with them

No man needs sympathy because he has to work, because he has a burden to carry. Far and away the best prize that life offers is the chance to work hard at work worth doing.

Genius is eternal patience.

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.

Leadership and learning are indispensable to each other.

Work does not kill a man, it is worry, irregularity and uncertainty that kill.

The day science begins to study non-physical phenomena, it will make more progress in one decade than in all the previous centuries of its existence.

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

Just because something doesn't do what you planned it to do doesn't mean it's useless.

Many people would no more think of entering journalism than the sewage business - which at least does us all some good.

What one has to do usually can be done.

You can't just ask customers what they want and then try to give that to them. By the time you get it built, they'll want something new.

Success is a lousy teacher. It seduces smart people into thinking they can't lose.

Obstacles are those frightful things you see when you take your eyes off your goals.

Results! Why, man, I have gotten a lot of results. I know several thousand things that won't work.

There is nothing more difficult to carry out, nor more doubtful of success, nor more dangerous to handle, that to institute a new order of things

It is better to serve like steel than rust and wither away like iron.

If I have ever made any valuable discoveries, it has been due more to patient attention, than to any other talent.

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

All your dreams can come true if you have the courage to pursue them