More quotes by Robert A. Heinlein

"Writing is not necessarily something to be ashamed of, but do it in private and wash your hands afterwards."
"A poet who reads his verse in public may have other nasty habits."
"An armed society is a polite society. Manners are good when one may have to back up his acts with his life."
"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."
"Almost any sect, cult, or religion will legislate its creed into law if it acquires the political power to do so."