[544] One should not run back to the past,
nor place hope in what has not yet come;
what is past has been abandoned,
and the future has not yet arrived.
Whoever sees with insight the presently arisen dhamma,
right there, in each case as it occurs—
unfaltering, unshakable—
having penetrated that, let him cultivate it.
Ardently should the duty be done this very day;
who knows whether death will come tomorrow?
For there is no bargaining
with Death and his great army.
One who dwells thus, ardent (ātāpī),
untiring by day and by night—
it is he, truly, whom the peaceful sage declares
'one who has a single auspicious night (bhaddekaratta).'
"Thus, venerable sir, did I instruct, rouse, inspire, and gladden the bhikkhus with a talk on the Dhamma; I spoke the summary (uddesa) and the analysis (vibhaṅga) of the one who has a single auspicious night."
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.