This limitless “between” has its strange critical point—the double. This is the first experience of the thinking man—when he notices the abyss that appears between himself and the rest of the world. This is the painful Two, the fundamental crack in the created world that gives rise to contradictions and all sorts of dualisms. This and that. You and me. Left and right. Sitra Achra, or the other side, the left side, the demonic forces in the guise of the broken shells of the vessels that could not hold the light when they were broken (shevirat haKelim)—that is the Two. Perhaps
