Adlai Stevenson (1900-1965) gave a speech in Denver on September 5, 1952. Stevenson was known for his wit, although he would lose the 1952 presidential election to Dwight Eisenhower. He said:
 
“Man does not live by words alone despite the fact that sometimes he has to eat them. Alas, in this world, he sometimes—or perhaps too often—he lives by catch words.”
 
The second line about “catch words” did not become popular, but the first line has been included in many books of quotations.
 
     
Wikiquote: Adlai Stevenson
Adlai Ewing Stevenson II (5 February 1900 – 14 July 1965) was an American politician and statesman, noted for his skill in debate and oratory; Governor of Illinois, he was twice an unsuccessful candidate for President of the United States running against Dwight D. Eisenhower (in 1952 and 1956). Under the John F. Kennedy administration, he served as United States Ambassador to the United Nations.
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Man does not live by words alone, despite the fact that sometimes he has to eat them.
. Speech in Denver, Colorado (5 September 1952).
 
6 September 1952, Boston (MA) Herald, “Text of Stevenson Speech” (AP), pg. 2, col. 7:
(A speech by Adlai Stevenson in Denver, Colorado.—ed.)
Man does not live by words alone despite the fact that sometimes he has to eat them. Alas, in this world, he sometimes—or perhaps too often—he lives by catch words.
 
15 january 1955, Greensboro (NC) Daily News, “Paragraphics,” sec. 1, pg. 6, col. 3:
“Man does not live by words alone, despite the fact that he sometimes has to eat them.”—Adlai Stevenson master phrasemaker. We are filing this under “Wish We Had Said That.”
 
Google Books
The Wit and Wisdom of Adlai Stevenson
Edited by Edward Hanna, Henry H. Hicks and Ted Koppel
New York, NY: Hawthorn Books
1965
Pg. 69:
Man does not live by words alone in spite of the fact that sometimes he has to eat them.
Gridiron Dinner
December I2, I960
Washington, D.C.
 
Google Books
Speaker’s Lifetime Library
By Leonard Spinrad and Thelma Spinrad
New York, NY: Prentice-Hall
1979
Pg. 146:
Man does not live by words alone, despite the fact that sometimes he has to eat them.
Democratic Presidential nominee Adlai E. Stevenson, speech in Denver, September 5, 1952
 
Google Books
The 2,548 Wittiest Things Anybody Ever Said
By Robert Byrne
New York, NY: Touchstone
2012
Pg. ?:
1,076
Man does not live by words alone, even though he sometimes has to eat them. —Adlai Stevenson (1900–1965)