According to dimensional theory we are already dead - that is to say, in some dimensions we're already done, and in other dimensions will live a lot longer than we will in this dimension. I seem to manage in our own dimensions just fine. Interestingly, in the concept of dimensions physics, we're probably pretty low lifeforms on account of only being able to observe a small fraction of the universe. If there is a 'god'-like being then he would consequently think no more of us than we do of atoms.
We tend to have a very linear concept about death, we seem to think that somehow our 'soul' gets re-used in other creatures, or we have an infinite existence of past and future and this life in the middle is just a stepping stone. Well frankly how that can be justified in any rational context is just obsurd, what other animals get this eternal existence? And what purpose would an eternal existence serve to us?
Eternity is part of the carrot and stick concept of mind control. Nothing more. We are not eternal.