Basic Mechanics of Our Universe
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Everything happens at the same time. This doesn’t mean that the past and present happen simultaneously. It means that all you will ever have is one moment where things happen at the same time.
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The past has already happened and is gone, but since we still have memories from the past, the way we move is literally influenced by things that happened before. So, in a way, the past still exists within us.
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Life is an arrow that points in one direction. I am sure we can go back in time, or that time is relative, but we can't go back in life.
Why is this so hard for many people to understand?
Because no matter when you look, all there is is everything happening at once. But we are also on a moving cart that only goes forward.
So, I (in Western Europe) and someone in Australia are living at the same moment now, but it's light here and dark there. So also has nothing to do with clock time.
Claiming that time is relative because someone ages differently in space is actually the other way around.
The brain is not the command center of the body; it is a relational device. If the brain were merely the control center of the body, we would have no influence over determining what is actually true and what is false, or over what we think about things. We wouldn’t be able to distinguish a true thought from a false one. But we can.
And if we couldn’t? Then the claim that everything is deterministic wouldn’t hold either—because that claim could also be falsified.