Robert A. Heinlein Quotes
Men rarely (if ever) manage to dream up a god superior to themselves. Most gods have the manners and morals of a spoiled child.
Time Enough for Love (1974)
Remember this: once the human race is established on more than one planet and especially, in more than one solar system, there is no way now imaginable to kill off the human race.
In a family argument, if it turns out you are right, apologize at once!
Love is the condition in which the happiness of another person is essential to your own.