Love is that condition in which the happiness of another person is essential to your own... Jealousy is a disease love is a healthy condition. The immature mind often mistakes one for the other or assumes that the greater the love the greater the jealousy.
Robert Anson Heinlein (July 7, 1907 – May 8, 1988) was an American science-fiction writer. Often called the "dean of science fiction writers", his controversial works continue to have an influential effect on the genre, and on modern culture more generally.
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