Man does not live by bread alone. I have known millionaires starving for lack of the nutriment which alone can sustain all that is human in man, and I know workmen, and many so-called poor men, who revel in luxuries beyond the power of those millionaires to reach. It is the mind that makes the body rich. There is no class so pitiably wretched as that which possesses money and nothing else. Money can only be the useful drudge of things immeasurably higher than itself. Exalted beyond this, as it sometimes is, it remains Caliban still and still plays the beast.

—Andrew Carnegie