More quotes by Robert A. Heinlein

"Women and cats will do as they please, and men and dogs should relax and get used to the idea."
"Anyone who cannot cope with mathematics is not fully human. At best, he is a tolerable subhuman who has learned to wear his shoes, bathe, and not make messes in the house."
"One man's theology is another man's belly laugh."
"May you live as long as you wish and love as long as you live."
"An armed society is a polite society. Manners are good when one may have to back up his acts with his life."