There is something called the Terror Management Theory. No, this theory has nothing to do with horror movies! Rather, it proposes that human behavior is always motivated by their sub-conscious fear towards death. So, religions supposedly came about to help us mere mortals make sense of the world (and make peace with death).
This brings me to a point raised by a Thai friend of mine. She mentioned how, in a Buddhist perspective, an early, natural death may not necessarily be a negative thing. A person who dies young may have a pure soul and have completed what he or she is meant to do on Earth.
I may not be a Buddhist, but what she said resounded in my heart. At 23, I’m still making sense of the world, let alone death. Ironically, I’ve come to realize that the fear of death has somewhat made my life worth living.