Why is death a necessary fact of life?

Death as a fact becomes less brutal if you can accept that it is a necessary part of life. The universe recycles everything in the never-ending flow of time. The atoms that make up your body have found a temporary shelter only. Like birds of passage they are always in flight. With your next breath you will take in several billion molecules of air once breathed by Buddha or Jesus, and when you exhale you will send molecules of air to be breathed tomorrow by people in China. Every other atom of your body is borrowed and must be repaid to the cosmos. The reason that the ancient Indians worshiped Shiva, the god of death and dissolution, wasn't out of fear alone, or a desire to placate him. The traditions of wisdom looked at nature and saw in its design creation and dissolution, the one inseparable from the other. At the deepest level, everyone is borrowing and repaying all the time. The scene isn't one of perpetual death but of life circulating within itself.