Most people believe that there is a power that is greater than us. This power goes by different names, and it is doubtful that we have named or identified it correctly yet. Being thankful for the time you had together, rather than angry that it has been taken away is a healthier way to relate to your universe. People must come to realize that in their universe they are still related to those who die. Think of someone closely related to you who lives several hundred miles away.
Unity is the nature of things.
We are all united in space and time. Science says so. Our great religions say so. Philosophy and the poets say so. You live united to all who have ever lived.