“You drink only sparingly. Is the beer too thin?” “No at all. I merely wish to keep my wits about me. It… — Jack Vance

“You drink only sparingly. Is the beer too thin?”

“No at all. I merely wish to keep my wits about me. It would not do if both of us became addled, and later woke up in doubt as to who was who.”

p. 447Source: Wikiquote · CC BY-SA 4.0