Life is short for those who are truly able to understand that one day the entire world will come to a complete end. Not everyone is capable of that. Not everyone has the ability to comprehend what going away for all eternity really implies. There are too many distractions, hour by hour, minute by minute, to hinder such an understanding.
When you realize there is something you don't understand, then you're generally on the right path to understanding all kinds of things.
But understanding will always require some effort. You probably wouldn't admire a friend who was good at everything if it cost her no effort.