That which is useless dies. Animals that fail to serve some useful purpose in the scheme of things slowly but surely become extinct. Let any part of the human body cease to perform its ordained function, and it withers-as when an arm is kept long in a sling. This same decree, that nothing useless is permitted to survive, runs through the mind of the industrial world.

Madame Curie didn't stumble upon radium by accident. She searched and experimented and sweated and suffered years before she found it. Success rarely is an accident.

If you do the best and the most you can today, don't worry about tomorrow.

Opportunity can benefit no man who has not fitted himself to seize it and use it. Opportunity woos the worthy, shuns the unworthy. Prepare yourself to grasp opportunity, and opportunity is likely to come your way. It is not so fickle, capricious and unreasoning as some complain.

If the deal isn't good for the other party, it isn't good for you.

Many of the most successful men I have known have never grown up. They have retained bubbling-over boyishness. They have relished wit, they have indulged in humor. They have not allowed ‘dignity’ to depress them into moroseness. Youthfulness of spirit is the twin brother of optimism, and optimism is the stuff of which American business success is fashioned. Resist growing up!

There is no fun equal to the satisfaction of doing one's best. The things that are most worthwhile in life are really those within the reach of almost every normal human being who cares to seek them out.