“My only regret is to die four pages too soon.”

Variant: One of the great secrets of life. Most people die of a sort of creeping common sense and discover too late that the only things one never regrets are one's mistakes.
Source: The Picture of Dorian Gray

"My Rainbow Race" (1967)
Context: One blue sky above us
One ocean lapping all our shore
One earth so green and round
Who could ask for more
And because I love you
I'll give it one more try
To show my rainbow race
It's too soon to die.

Source: Nonfiction, Dave Barry's Book of Bad Songs (1997), p. xvii

Source: Book of Longing

Si nasce come una pagina bianca e si muore come una pagina nera.

From On the Twentieth Century (12 November 1941)

Source: Lighthousekeeping

At a King's College college feast, as quoted in 1949, John Maynard Keynes, 1883-1946, Fellow and Bursar, (A memoir prepared by direction of the Council of King’s College, Cambridge University, England), Cambridge University Press, 1949, page 37. This in turn quoted in Quote Investigator, " My Only Regret Is That I Have Not Drunk More Champagne In My Life https://quoteinvestigator.com/2013/07/11/more-champagne/", 2013-07-11
Attributed