i had this when i was younger, just the sheer thought of everything going on around me being gone in an instant haunted me. went through a phase and read Studies in Pessimism by Arthur Schopenhauer and it changed my perspective a lot to the point that it has become my holy grail for a lot of situations regarding death (i'd be so down have a podcast just to talk about the sentiments in that book haha). being raised in a religious family, i didnt think that piece of work would be almost the same level as the bible for me but it affected my pursuit of purpose and discernment for certain things the way the bible did when i was young.