Related:

• Anyone who considers protocol unimportant has never dealt with a cat. -- R. Heinlei
• Anyone who cannot cope with mathematics is not fully human.
  At best he is a tolerable subhuman who has learned to wear shoes, bathe and not make messes in the house....
• Anyone who cannot cope with mathematics is not fully human.
  At best he is a tolerable subhuman who has learned to wear shoes, bathe and not make messes in the house....
• Never try to out-stubborn a cat. -- Lazarus Long, from Robert A. Heinlein's "Time Enough For Love
• Quote #280 Heinlein, we've noted, has roughly four main characters (for anyone who might have missed it, they are
  The crusty old man, who is Heinlein; the competent young man, who is a young Heinlei...
• Love your country, but never trust its government. -- Robert A. Heinlein.
• Never underestimate the power of human stupidity. -- Robert Heinlein, Time Enough for Love
• Never underestimate the power of human stupidity. -- Lazarus Long by Robert A Heinlei
• What a wonderful world it is that has girls in it! -- Lazarus Long by Robert A Heinlei