When a man is in the right path, he must persevere.

Politeness and civility are the best capital ever invested in business. Large stores, gilt signs, flaming advertisements, will all prove unavailing if you or your employees treat your patrons abruptly. The truth is, the more kind and liberal a man is, the more generous will be the patronage bestowed upon him.

Small does of advertising result in nothing, obviously. It's like giving a sick person half the medicine he needs. It just causes more suffering. Give the whole dose, and the cure will be certain and decisive.

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.

Never attempt to catch a whale with a minnow.

Money is good for nothing unless you know the value of it by experience.

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