Address at Princeton University, "The Educated Citizen". 22. März 1954. auch in: What I think. New York und London 1956. S. 172 ff. (die Rede), S. 179 (das Zitat)
Original engl.: "To my way of thinking it is not the years in your life but the life in your years that count in the long run. You'll have more fun, you'll do more and you'll get more, you'll give more satisfaction the more you know, the more you have worked, and the more you have lived. For yours is a great adventure at a stirring time in the annals of men." - princeton.edu http://infoshare1.princeton.edu/libraries/firestone/rbsc/mudd/online_ex/stevenson/adlai1954.html
Variante: "It is not the years in your life but the life in your years that counts."