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 - in fact, they are almost incompatible; one emotion hardly leaves room for the other.
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.
Enjoy the best Robert A. Heinlein picture quotes.
Read more about Robert A. Heinlein on Wikipedia.