"Anybody can be a non-drunk. It takes a special talent to be a drunk. It takes endurance. Endurance is more important than truth."
(Henry Chinaski - writer and drunk, played by Mickey Rourke in Barfly; based on the novels of Charles Bukowski)
By the way, the unattributed witticism that I posted as my Weekly Bon Mot at the start of this month was another film quotation, a line from endearing sleazeball Tommy Basilio (Steve Buscemi) in Trees Lounge - one of the great films about bars, written and directed by Buscemi.