Every action has its pleasures and its price.

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

Success means we go to sleep at night knowing that our talents and ablities were used in a way that served others.

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

I don't like that man. I must get to know him better.

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

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

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

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...

We are trying to prove ourselves wrong as quickly as possible, because only in that way can we find progress.

I never pick up an item without thinking of how I might improve it.

The superior man understands what is right; the inferior man understands what will sell.

Either you run the day or the day runs you.

Innovation distinguishes between a leader and a follower.

A good idea is never lost. Even though its originator or possessor may die without publicizing it, it will someday be reborn in the mind of another....

We struggle with the complexities and avoid the simplicities.

The secret of success is constancy to purpose.

Find out what you really love to do, and then find a way to make a good living doing it.

Success is having a flair for the thing that you are doing, knowing that is not enough, that you have got to have hard work and a sense of purpose.

Speak softly and carry a big stick; you will go far.

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