Without getting too specific, we can surmise that infranthin is the space between spaces, the sound between sounds, the sensation between sensations; neither here nor there, this nor that, but both—all at the same time. The closest metaphor is the fourth dimension, which is best illustrated by a cube collapsing in on itself and at the same time expanding. I know. It’s not very helpful. But that’s the whole point—it’s a moving target, a ball of contradictions; just when you think you’ve got it, it’s escaped you.