You know thst you are going to die but that does not mean that you can not live a fulfilling life whilst you are here. Survival is important so you must take care of it, but you must also make your life beautiful. Joy is honestly the way, you can either use intellect to create a really enjoyable and fulfilling life or you can use it to make hell for yourself. So you are going to die, does that not make it all the more important thst you make it grest whilst you are here? Nothing lasts forever but if you can create long lasting wellbeing for you and help those around you to do the same then that makes alot of sense if you think that everything is about Survival then yes you will get sad that everything is going to be destroyed, but if everyrhing is about wellbeing then you live life in the way it should be lived, if you never start anything because you know it s going to end how can you ever get the joy of self development and improvement, personal achievement?