“How dispiriting I find it, even after all my personal triumphs, that we must grow up and grow sad, that we must age, weaken, and in time go home to our long home in the ground, and that even golden lads and girls all must, as chimney sweepers, come to dust.”

A Peck of Gold (1926)

Seasons
Lyrics, Duty

Source: Comet in Moominland

His Own Epitaph, written the night before his execution (1618) and found in his Bible in the Gate-house at Westminster; reported in Bartlett's Familiar Quotations, 10th ed. (1919).
Source: https://www.youtube.com/watch?v=-tnk8RpOFWw "Even Such is Time" — Choir of Salisbury Cathedral

Source: The Postman (1985), Section 3, “Cincinnatus”, Chapter 18 (p. 298)

No. 9, st. 7.
Last Poems http://www.gutenberg.org/dirs/etext05/8lspm10.txt (1922)

The Legend of Jubal (1869)
Context: New voices come to me where'er I roam,
My heart too widens with its widening home:
But song grows weaker, and the heart must break
For lack of voice, or fingers that can wake
The lyre's full answer; nay, its chords were all
Too few to meet the growing spirit's call.
The former songs seem little, yet no more
Can soul, hand, voice, with interchanging lore
Tell what the earth is saying unto me:
The secret is too great, I hear confusedly.

My Boy Friend’s Name is Jello (p. 95)
Short fiction, Or All the Seas with Oysters (1962)