Line and color
Some say that line and color are subjects too difficult for a short note, other say they are not worth to talk about; Magnes suggests do reflect a line as a conjunction. A line is a line of force which runs from one pole to the other. J. doubts that. Speaking about poles is just a reflection of a theological figure: The figure of god and men. Writing is a sort of alignment between men and god.
D.: And color? The perception of color is not equally distributed. It opens a realm of fuzziness, which we have to overcome by a non-retinal art.