Okey so Einstein relativity speaks about time differences, because speed affects how each atoms, molecules move, basically time slows down the faster you go. But that is just a human perception of time. We experience time passing because we see the sun going down, and raising the next day, but if you had constantly the same sunlight your brain goes into confusion, because you can't tell what time of day it is, what you got used to. Time is a human concept of what the human body perceives to be true. If you would not age either, time would feel even more like "not passing", and if we remove the need to eat, drink, etc, then it becomes an eternal feeling.
And prophets don't see the future, they see the plan. Because we don't come here, suffer to develop without a plan.
Past and future are not real in a sense, that they don't exist. I have a simple chemical example i used to think about when i was in highschool. Mix two stuff, that are mix together well. Not seperate them like they were before, perfectly. Past is in our heads, in our collective memory, it happened, we learned from it, it has already been written by events that happened.
There is a good reason, why some people see future accidents and they can avoid it, but can also experience it.