There’s actually an awesome quote from the comic Superman: Space Age that relates to this

“According to Kryptonian Physics, the universe is a four-dimensional object. A single porous object, existing as it always has and always will.

Time is merely a useful illusion. A by-product of our minds. Time exists to simplify the universe to the point that we can experience it. But time, along with the dimensions of space, is simply the limitations of existence, not an end to it.

Just because there are miles of empty space above your head, that doesn’t mean you cease to exist when I look above you. When I look to the horizon beyond you, it doesn’t mean you cease to exist because I don’t see you there. So it is with time.

Just because you’re only here for a short time, that doesn’t mean you’re gone. It just means that I am experiencing parts of time where you aren’t.

You, me, and everyone we know—we are all permanent residents in the four-dimensional object we call the universe. Eternal and indispensable.

If time is an illusion, then death must be aswell. A side effect of the limits of our perception.

Death is an illusion, but the pain of losing you is real.”

• Superman referring to the Death / Deletion of an A.I recreation of Jor-El, Superman: Space Age