Draw a line across—to represent movement in time and space—and that line seems to divide it.
That’s only if you see in two dimensions.
Picture 360° and that line is in a tunnel or tube of space. Instead of the line causing one side to face another, it’s encircled: all parts accessible at once. The line helps you enter the picture. Without the line, there was sky, and how, otherwise, can you enter that?
Where is the place where time stops?
In your mind, when you see other dimensions. When space goes from “flat” and horizontal and curls up into a tube—as how cosmic space folds round the Earth, which experiences dawn and dusk at the same time.
Switch places from the inside of the tube to the outside, where the curve opens up and away towards an ever broader horizon.