To be sure, some humans were always doing silly things—but at what point had prime damfoolishness become commonplace? When for example, had the zombi… - Robert A. Heinlein

...I have this one nasty habit. Makes me hard to live with. I write...

...writing is antisocial. It's as solitary as masturbation. Disturb a writer when he is in the throes of creation and he is likely to turn and bite right to the bone... and not even know that he's doing it. As writers' wives and husbands often learn to their horror...

...there is no way that writers can be tamed and rendered civilized. Or even cured. In a household with more than one person, of which one is a writer, the only solution known to science is to provide the patient with an isolation room, where he can endure the acute stages in private, and where food can be poked in to him with a stick. Because, if you disturb the patient at such times, he may break into tears or become violent. Or he may not hear you at all... and, if you shake him at this stage, he bites...

"I've found out why people laugh. They laugh because it hurts so much... because it's the only thing that'll make it stop hurting"
...
But that's not all people laugh at."
Isn't it? Perhaps I don't grok all its fullness yet. But find me something that really makes you laugh sweetheart... a joke, or anything else- but something that gave you a a real belly laugh, not a smile. Then we'll see if there isn't a wrongness wasn't there." He thought. "I grok when apes learn to laugh, they'll be people."

“Georges, I don’t know much about California politics—”
“My dear, no one knows much about California politics, including California politicians.”