“I’m not confused—I’m only well-mixed”

Poet Robert Frost (1874-1963) frequently said “I’m not confused; I’m only well-mixed” (also “I’m not confused; I’m just well-mixed”). The saying (which dates to at least 1958) has been used by those who serve and consume mixed alcoholic drinks.
 
   
Wikipedia: Robert Frost
Robert Lee Frost (March 26, 1874 – January 29, 1963) was an American poet. He is highly regarded for his realistic depictions of rural life and his command of American colloquial speech. His work frequently employed settings from rural life in New England in the early twentieth century, using them to examine complex social and philosophical themes. A popular and often-quoted poet, Frost was honored frequently during his lifetime, receiving four Pulitzer Prizes for Poetry.
     
30 November 1958, New York (NY) Times, “The ‘Quietly Overwhelming’ Robert Frost” by Milton Bracker, pg. SM15:
“THERE’S nothing in me to be afraid of,” he will assure you. “I’m too offhand; I’m an offhander.” But there is a deadly joke in his offhandedness. As he says, slipping it in casually, in another connection, “I bear watching.” Moreover, he will let you know disarmingly that “I’m not confused; I’m only well-mixed.”
   
Google Books
International Celebrity Register
1959
Pg. 273:
Frosi. himself, can be playful (“you’ve got to snap the quip to make Pegasus dance”), sullenly innocent (“I’m not confused; I’m only well-mixed”), even sheepish (“I bear watching”).
   
Google Books
An introduction to Robert Frost
By Emily Elizabeth Isaacs
Denver, CO: Alan Swallow
1962
Pg. 63:
Frost is mildly amused by their confusion, and he answers them with what may be the most telling remark of all: “I’m not confused; I’m just well-mixed.”
 
Google Books
Interviews with Robert Frost
By Robert Frost and Edward Connery Lathem
New York, NY: Holt, Rinehart and Winston
1966
Pg. 185:
Moreover, he will let you know disarmingly that, “I’m not confused; I’m only well-mixed.”