Al-Ghazali wrote that "the body of the heavens proceeds from only one and the same simple entity and the simple can cause only that which is simple of shape, namely the sphere, and that which is perfectly homogeneous, that is, has no special distinguishable character."
All the tangent sides of a sphere are the same, and innumerable, and the sphere itself has one side overall in the surface, of which all points are the same difference. There's no distinction between up or down or lateral or vertical in a true sphere. Labels, of relative position among things, begin to separate out the parts.