Having explained in general terms how the Chariot appears in the prophetic vision, we will now begin to discuss some of the more basic details that need to be understood. First of all is the general form in which the Sefirot appear, circular or upright.
The proposition has two parts: Part 1: The spiritual forms... This discusses in general terms how the forms seen in the prophetic vision are to be understood. Part 2: Thus the circle... This explains the circular and upright, linear schemes in which the Sefirot appear.