"A science or an art may be said to be "useful" if its development increases, even indirectly, the material well-being and comfort of men, it promotes happiness, using that word in a crude and commonplace way."

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Grateful return for happiness conferred is not the method of exchange in a partnership. The comfort a man takes with his wife is not in the nature of a business partnership, nor are her frugality and industry.

— Charlotte Perkins Gilman