(Buddhism) Everything prosperous will eventually decline.

(uncommon) inevitable decline

even if one says

lesson, teaching

to teach

a prosperous person, the prosperous, those who prosper

to forget / (auxiliary verb, after the continuative form of a verb) to forget to …

inevitably, certainly

distal demonstrative, something far off removed from both speaker and listener: that, yon / particularly, male personal third person pronoun: he / by extension from he: boyfriend

he; boyfriend