"Mathematics is a place where you can do things which you can't do in the real world."

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Consider, for example, lust versus love. When we lust after someone or something, we think in terms of what they (or it) can do for us. When we love, however, our thoughts are immersed in what we can give to someone else. Giving makes us feel good, so we do it happily. But when we lust, we only want to take. When someone we love is in pain, we feel pain. When someone whom we lust is in pain, we only think in terms of what that loss or inconvenience means to us.

— David J. Lieberman