The secret of success is constancy to purpose.

If you are the master be sometimes blind, if you are the servant be sometimes deaf.

Success is the doing, not the getting; in the trying, not the triumph. Success is a personal standard, reaching for the highest that is in us, becoming all that we can be. If we do our best, we are a success.

There is nothing impossible to him who will try.

One of the main weaknesses of mankind is the average man's familiarity with the word 'impossible'.

'To Start Press Any Key'. Where's the ANY key?

Change yourself and your work will seem different.

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

I'm a slow walker, but I never walk back.

The greatest leader is not necessarily the one who does the greatest things. He is the one that gets the people to do the greatest things.

Your most unhappy customers are your greatest source of learning.

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

In the business world, the rearview mirror is always clearer than the windshield.

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

The best way to destroy an enemy is to make him a friend.

All achievement, all earned riches, have their beginning in an idea.

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.

The world does not pay men for that which they 'know'. It pays them for what they do, or induce others to do.

What I cannot create, I do not understand.

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

Dad, you've done a lot of great things, but you're a very old man, and old people are useless.