"If you don't have passion, you have no energy, and if you don't have energy, you have nothing."

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Of course, the laws of science contain no matter and have no energy either and therefore do not exist except in people's minds. It's best to be completely scientific about the whole thing and refuse to believe in either ghosts or the laws of science. That way you're safe. That doesn't leave you very much to believe in, but that's scientific too.

— Robert M. Pirsig