The need for ultimate unification of division with union is an important principle in all areas of life; it reflects the need not just for two opposing principles, but for their opposition ultimately to be harmonised.
Consider again the metaphor of traveling between higher and lower dimensions: the column in the dimensions is whole but is divided into its parts when viewing it re-presentation in two dimensions, its shadows (circle & rectangle). Believing this is all there is to it limts the understanding so one must return the parts to each other and reconcieve the three dimensionality.
The column is not just the whole 3D shape or the re-presented 2D shapes: it is both and simultaniously neither.
