“There are people who strictly deprive themselves of each and every eatable, drinkable and smokeable which has in any way acquired a shady reputation. They pay this price for health. And health is all they get for it. How strange it is. It is like paying out your whole fortune for a cow that has gone dry.” — Mark Twain
“When they used to tell me I would shorten my life ten years by smoking, they little knew the devotee they were wasting their puerile word upon—they little knew how trivial and valueless I would regard a decade that had no smoking in it!” — Mark Twain
He is also known to have used Bad Words in his published works, which have been widely banned and declared Badthink. Memory hole material.