People refuse to take chances in business, because they fear the criticism which may follow if they fail.

I am easily satisfied with the very best.

No tears in the writer, no tears in the reader. No surprise in the writer, no surprise in the reader.

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

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

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

Personally, I enjoy working about 18 hours a day. Besides the short catnaps I take each day, I average about four to five hours of sleep per night.

It's fine to celebrate success but it is more important to heed the lessons of failure.

Tell the audience what you're going to say, say it; then tell them what you've said.

God sells us all things at the price of labor.

If everyone is moving forward together, then success takes care of itself.

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

Whosoever desires constant success must change his conduct with the times.

The man who is swimming against the stream knows the strength of it.

The difference between a successful person and others is not a lack of strength, not a lack of knowledge, but rather a lack in will.

There is nothing impossible to him who will try.

Your most unhappy customers are your greatest source of learning.

Success is going from failure to failure without loss of enthusiasm.

It's a terrible thing to look over your shoulder when you are trying to lead - and find no one there

I do know that when I am 60, I should be attempting to achieve different personal goals than those which had priority at age 20.

Old Professors never die, they just lose their faculties.