Things said or done long years ago,
Or things I did not do or say
But thought that I might say or do,
Weigh me down, and not a day
But something is recalled,
My conscience or my vanity appalled.

William Butler Yeats (1865-1939) Irish poet and dramatist

“Vacillation,” st. 4 (1932), The Winding Stair and Other Poems (1933)
    (Source)