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.

Every man should make his son or daughter learn some useful trade or profession, so that in these days of changing fortunes of being rich today and poor tomorrow they may have something tangible to fall back upon. This provision might save many persons from misery, who by some unexpected turn of fortune have lost all their means.

Science is the pursuit of pure truth, and the systematizing of it.

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.

Whatever you do, do it with all your might. Work at it, early and late, in season and out of season, not leaving a stone unturned, and never deferring for a single hour that which can be done just as well now.

Many people are gullible, and we can expect this to continue.

You must exercise your caution in laying your plans, but be bold in carrying them out.