The world is filled with unfortunate souls who didn't hear opportunity knock at the door, because they were down at the convenience stor buying lottery tickets.

The jack-of-all-trades seldom is good at any. Concentrate all of your efforts on one definite chief aim.

They [the people under you] may desire help, but more than anything else they desire sympathy. Don't make the mistake of turning such men down with the statement that you have troubles of your own.

The average person would have quit at the first failure. That’s why there have been many average men and only one Edison.

The power to think as you wish to think is the only power over which you have absolute control.

The man who actually knows just what he wants in life has already gone a long way toward attaining it.

I believe that close association with one who refuses to compromise with circumstances he does not like, is an asset that can never be measured in terms of money.