On two subjects the overwhelming majority of people regarded their own opinions as Absolute Truth, and sincerely believed that anyone who disagreed with them was immoral, outrageous, sinful, sacrilegious, offensive, intolerable, stupid, illogical, treasonable, actionable, against the public interest, ridiculous, and obscene. The two subjects were (of course) sex and religion.
Robert A. HeinleinAny group is weaker than a man alone unless they are perfectly trained to work together.
Robert A. HeinleinThe future is better than the past. Despite the crepe hangers, romanticists, and anti-intellectuals, the world steadily grows better because the human mind, applying itself to environment, makes it better. With hands ... with tools ... with horse sense and science and engineering.
Robert A. HeinleinThe golden sunshine of Italy congealed into tears. Here's to alcoholic brotherhood ... much more suited to the frail human soul, if any, than any other sort.
Robert A. HeinleinSex, whatever else it is, is an athletic skill. The more you practice, the more you can, the more you want to, the more you enjoy it, the less it tires you.
Robert A. HeinleinThe second best thing about space travel is that the distances involved make war very difficult, usually impractical, and almost always unnecessary. This is probably a loss for most people, since war is our race's most popular diversion, one which gives purpose and color to dull and stupid lives. But it is a great boon to the intelligent man who fights only when he must-never for sport.
Robert A. Heinlein