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 A. HeinleinThe killer looked up as the bullet hit him. He looked as if he were puzzled by some strange occurence, being too freshly dead to be aware of it.
Robert A. Heinlein