I have been listening to Brian Greene's, "The Fabric of the Cosmos: Space, Time, and the Texture of Reality", on audio book. The way he explains it, all of time exists now. Everything from the beginning of time until the end of time exists right now. He takes a couple of chapters to explain it, but it does make sense (what I can understand anyway). What we think of as now depends on different things. For example,He goes on to explain another way in which two people living on worlds 10 billion light years apart could have the same "now list" until one gets up and walks toward or away from the other. Then, fly's toward or away from the other. This movement would cause the "now list" of the one moving to differ from 150 years when walking at 10 miles an hour, to 15,000 years when flying at 1,000 miles an hour."You are not seeing the words on this page as they are now; instead, if you are holding the book a foot from your face, you are seeing them as they were a billionth of a second ago. If you look out across an average room, you are seeing things as they were some 10 billionths to 20 billionths of a second ago; if you look across the Grand Canyon, you are seeing the other side as it was about one ten-thousandth of a second ago; if you look at the moon, you are seeing it as it was a second and a half ago; for the sun, you see it as it was about eight minutes ago; for stars visible to the naked eye, you see them as they were from roughly a few years ago to 10,000 years ago."
(A "now list" is a mental list or snapshot of everything that exists right now for the person making the list.)
He sums things up by saying,So, given that everything that has happened and everything that will happen, has already happened (not to us, but to some one/thing), has all of reality been choreographed? Are we free to make decisions? Or, are the decisions that we do make an illusion of free will? Have our choices already been decided long before humans even existed? If so, then by who/what?"So: if you buy the notion that reality consists of the things in your freeze-frame mental image right now, and if you agree that your now is no more valid than the now of someone located far away in space who can move freely, then reality encompasses all of the events in space-time. The total loaf exists. Just as we envision all of space as really being out there, as really existing, we should also envision all of time as really being out there, as really existing, too. Past, present, and future certainly appear to be distinct entitles. But, as Einstein once said, "For we convinced physicists, the distinction between past, present, and future is only an illusion, however persistent .The only thing that's real is the whole of space-time."
Very hard if not impossible to wrap our minds around that one, huh?![]()



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