Old Professors never die, they just lose their faculties.

I do not like to repeat successes, I like to go on to other things.

I will prepare and some day my chance will come.

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.

There is but one dependable method of accumulating and legally holding riches, and that is by rendering useful service.

I've always thought anyone can make money. Making a life worth living, that's the real test.

Percentages are why I am rich.

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.

When you know what you want, and want it bad enough, you will find a way to get it.

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

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.

No man can taste the fruits of autumn while he is delighting his scent with the flowers of spring.

For it is commonly said: accomplished labours are pleasant.

Because ideas have to be original only with regard to their adaptation to the problem at hand, I am always extremely interested in how others have used them...

Leadership and learning are indispensable to each other.

Four things for success: work and pray, think and believe.

I'm not the smartest fellow in the world, but I can sure pick smart colleagues.

Advertising is legalized lying.

If you think of yourselves as helpless and ineffectual, it is certain that you will create a despotic government to be your master. The wise despot, therefore, maintains among his subjects a popular sense that they are helpless and ineffectual.

Never make excuses. Your friends don't need them and your foes won't believe them.

I've always found the second book in a series is the hardest to write.