Strictly speaking, both time and space are tools and illusion created by humans for convenience as well as to describe the world. It was a measure, designed by the logic of the human mind, and not an absolute existence.
Time would extend with speed, space would distort from mass—no matter how psalms would sing about the eternity of all space and time, it was all a romantic fantasy.
While dimensional rifts were described as fissures of space shattering, it was fundamentally the wrinkling caused by gravity from an extremely dense object. It curled from the frightening attraction force, distorting even light that existed in between, forming irregular darkness in an observable wavelength to the human eye, consuming everything just like a rift directed to nothingness.
Therefore, a mysterious, indestructible world barrier existed as well. Things that entered it was not merely light, but endless elements, ether and Steel Strength, which made it invincible.
