It is only God who cannot die. It is only God who has immorality dwelling in Him. Everyone of us will die. The Lord Jesus Christ introduced the Father to His disciples through the Lord’s prayer. He taught us to pray to God. That is the Father. It is the Father that Apostle Paul wrote about that he has immorality dwelling in Him. There is no other person in this world who won't die.
Every man has an appointment with death. The Bible says that it is appointed unto man to die. So, man will die. We will die. That does not mean that there is no God. In fact our death tells us that there is a God. He is the God who gives us life and who takes life. Death reveals to us that there is something very important.
The important thing that we are learning from our death is that judgement is coming. When we die we will face judgement. Just as death is inevitable, judgement too is inevitable. We will all face judgement after our death.