"I'm surrounded by the scene of aging. I myself am in my 70s and not getting any younger. Although I'm very healthy, and I have a lot of energy, and I still feel 50, I'm over 70 and I understand that I am preparing for later."

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We are morphing as we go through things, and then we're presented with the notion of a soul. A soul implies more than just the preservation of energy. Science will tell you that you can explode a person, but their energy still exists - even if they're decimated, the universe will preserve that in the form of heat or whatever it is. So there's a preservation of our molecules or whatever, but is there a preservation of a thing that's called the self if that thing is not actually ever one thing?

— Mike Cahill