“Now he has departed from this strange world a little ahead of me. That means nothing. People like us, who believe in physics, know that the distinction between past, present, and future is only a stubbornly persistent illusion.”
Einstein was prescient: “a little ahead of me” proved to be literally true, as Einstein died just a little over a month after the passing of Besso.
The words were intended to comfort a grieving family, not to reveal some profound truth about physics. Still, if I wanted to seek deeper meaning, I think the point is that while we experience the present, imagine the future, and remember the past, they all “exist” in a sense: the fact that a person’s life has come to an end does not erase that life and the reasons to celebrate it if it was a good life, a meaningful life.
I said similar things to my Mom just a few months ago, when she lost her husband, my stepfather, after a marriage that lasted nearly 47 years. (They’d have had their 47th wedding anniversary yesterday.)
My understanding is only the present exists. All the events happening, anywhere in the Universe, at present, are hapening simultaneous. All the events that happened before the present, happened in the past. All the events that will happen after the present, happen in the future.
I don't see any illusion in this concept. What are illusions is the concept like length contraction.
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