As a general thing, I have not 'duped the world' nor attempted to do so... I have generally given people the worth of their money twice told.

Money is a terrible master but an excellent servant

Nobody ever lost a dollar by underestimating the taste of the American public.

In the United States, where we have more land than people, it is not at all difficult for persons in good health to make money.

Money is in some respects life's fire: it is a very excellent servant, but a terrible master.

There is no such thing in the world as luck. There never was a man who could go out in the morning and find a purse full of gold in the street to-day, and another to-morrow, and so on, day after day: He may do so once in his life; but so far as mere luck is concerned, he is as liable to lose it as to find it.