It’s like in this universe, we process time linearly forward. But outside of our spacetime, from what would be a fourth-dimensional perspective, time wouldn’t exist, and from that vantage, could we attain it. We’d see our spacetime would look flattened, like a single sculpture with matter in a superposition of every place it ever occupied, our sentience just cycling through our lives like carts on a track. See, everything outside our dimension that’s eternity, eternity looking down on us. Now, to us, it’s a sphere, but to them… it’s a circle.