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 basic of all morality is duty, a concept with the same relation to group that self-interest has to individual.
Robert A. HeinleinThere are only five things really worth drawing; four of them are pretty girls and the fifth is cats.
Robert A. Heinlein