The Watchtower Corporations main appeal is a everlasting life, this makes it possible for one to avoid Existential Dread. This type of anxiety is a part of the human condition, and it explains the appeal of many religions to the human condition as it offers some relief from the anxiety about our life ending.
Psychologist show the importance for facing this dread/anxiety.
My feeling is that the more you can accept the fact that your life is very very temporal, the better you will live your life as you accept that you are very temporary and try to live life to the full and not be duped by religions appeal to calm this anxiety.