Death meditations are common in a lot of faiths. In Islam it's mentioned in hadith, Christianity has the practice of memento mori. And even in Time there was a tradition that during a Triumph, a large parade for a successful military commander and one of the greatest honors that could be bestowed on a person, a slave would be tasked to sit by the commanders ear during the celebration and whisper "remember you will die". I think it's naturally something a lot of people could gain from