The spirit, with the hallucinatory structure of linear time, is not eternal, and that is good. If there is an eternal spirit that you have, it is not within your practical perception and use from this current state of life. Eternity is not Linear Time. Time doesn't pass, it happens all at once with no time before or after. There is no causality, and we base a good chunk of what reality is, completely, on linear causality. If you are floating in the clouds, wings spread out in bliss, then if that is Eternal, then it is simply a thing that exists, like a bolt in a skyscraper, not a person walking around and living. You are static and fixed, not dynamic and in motion. Quite literally a solid-state component in the larger machine stripped completely of free will. But, back to the Linear Spirit. When you die, your Linear Self, which is the whole of your experience, will vanish as if it was never there to begin with. Therefore, the Linear Spirit is a creature of the Linear Now. That extra something that is more than the sum of the parts that make you. Those parts are your memories, your expectations, and your sentience. Your world model is just the little box you operate in. Your breakfast and your spilled coffee is literally the entire world. You interact with others, who also live in similar boxes, and you affect each other in your own small ways, but overall it is not a life that is altogether special or grand like religions would tell you. There is no significance beyond your little box, and there is nothing wrong with that. If you are a ripple in a coffee cup, then love being that ripple while it is happening. Don't sacrifice happiness for an eternal reward, because the religious promise of eternity is given in the context of a linear experience. This moment, when you are reading this, is the entire world, and you are alive right now, never to be exactly the same ever again. Appreciate that. Eternity can wait because that's all eternity is.