You have always been there and you would always be there as spirit is immortal.
The body of every being is comprised of Panchtatvas or 5 elements and these panchtatvas are immortal. Since the time you are born, you are told that you have to die, so you start dying, if you believe it to 100% that you are immortal, you would become immortal. Everything is here and immortal but your very thoughts make you mortal. You need to control your thoughts to control things in life. If you do not die, the earth would stop evolving and things would stop changing and there would be no space for new progeny so you are trained from the beginning to die.
Every beginning has to have an end, so if someone is born has to die, whether you want it or not, you have to realise, if you are born, you have to die.
God was always there and you were always there too, as God is immortal and you are one with the god, so you are immortal too. Rest everything is an illusion like an illusionist is creating it.
We all emerged from light which is the purest form of energy and our chakras system proves that. The 7 colours of Chakras are same as the 7 colours of the spectrum formed when light passes through prism. Everything on this earth is one or another form of energy but at different levels of awareness. If we all emerged from light, then we all appear different but we all are same like different leaves of a same tree. Now as a part of the process the old leaves are shed in every autumn and new leaves are grown on same tree. Same way, old bodies are shed in this Universe so that new bodies are grown up, like you would not like to see all yellow leaves on tree, this tree of Universe would not look beautiful with old bodies, who have no strength, who are gray. So the process of rebirth is designed. Now in this process, like you do not miss the old leaves and the tree is still standing in your garden, this Universe tree is still standing and prospers again, so shedding of the leaves is not supposed to be missed. You are present in every being and everything, so even if this body is shed, you still exist as there would always be something which would be there so you would exist in that form. Same way, you had existed earlier. Just because now you have a body to identify with, does not mean you exist only now. You were always there in different beings and different things and you would always be there. You need to stop identifying with the mere body. Once you realise the truth, you would exist eternally.
When you realize this, you gain absolute freedom, freedom from the fear of death as there is no death.
