“"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.”
Other Robert A. Heinlein Quotes
For me, politeness is a sine qua non of civilization.
Robert A. Heinlein 
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Anyone who considers protocol unimportant has never dealt with a cat.
Robert A. Heinlein
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No statement should be believed because it is made by an authority.
Robert A. Heinlein
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Be wary of strong drink. It can make you shoot at tax collectors... and miss.
Robert A. Heinlein
56% of people like this quote