We are all immortal, though not continuously

This life as you now live it and have lived it, you will have to live once more and innumerable times more since every configuration of atoms and events will occur. During death, our configuration and energy are conserved as the soul, to manifest again in the next creation. This cycle goes on endlessly. Matter cannot be destroyed or created only transformed and after x number of transformations you'll come back in this form. The law of conservation of energy demands eternal recurrence. By considering the universe as an infinite series of compositions or configurations, one concludes that the composition of this very moment one is living will—must—occur again. Any given configuration must have a probability greater than zero, being that otherwise it would not have come to pass. One's 'self' identity is a creation of will to power, or more accurately, a system of quanta or centers of force (an oligarchy). 


Heinrich Heine, who once wrote:


Time is infinite, but the things in time, the concrete bodies, are finite. They may indeed disperse into the smallest particles; but these particles, the atoms, have their determinate numbers, and the numbers of the configurations which, all of themselves, are formed out of them is also determinate. Now, however long a time may pass, according to the eternal laws governing the combinations of this eternal play of repetition, all configurations which have previously existed on this earth must yet meet, attract, repulse, kiss, and corrupt each other again.


Eternal return also known as "eternal recurrence" is a concept that the universe has been recurring, and will continue to recur, in a self-similar form an infinite number of times across infinite time or space. We tend to think of time in terms of a three-part structure of past, present, and future, with time moving in one direction without repetition. Though events can repeat themselves, tomorrow is fundamentally different and separate from yesterday. Though this simple binary may be something of an oversimplification, it’s still a useful model to consider. Cyclical time, naturally enough, emphasises repetition and is very much influenced by the cycles apparent in the natural world.



 Within the matrix of ancient religions and philosophies, life was seen as part of an endless cycle of birth and death; time was like a wheel, spinning ceaselessly. Yet somehow, the ancient Jews began to see time differently. For them, time had a beginning and an end; it was a narrative, whose triumphant conclusion would come in the future. From this insight came a new conception of men and women as individuals with unique destinies–a conception that would inform the Declaration of Independence–and our hopeful belief in progress and the sense that tomorrow can be better than today.


Judeo-Christian thinking implies a one-way, linear time in which the future is fundamentally different from what has gone before, with bibilical time progressing from creation to judgement day. Each successive moment is qualitatively different from the one before, and there is no repetition. According to Cahill this fundamental aspect of modern Western culture comes to us thanks to the Jews, who he argues thought about time in a way that was radically different from all the contemporary cultures in the Mesopotamian world from which they came. And it is not hard to see that our modern sense of progress, of forward momentum, of change, stems from this way of looking at time. Indeed, as Cahill argues, cyclical time is kind of the norm in most cultures around the world, and the Jewish notion of linear time was an unusual innovation when it came along.