The underlying spiritual forms seen in prophecy show things in accordance with the nature of each particular form as it actually appears in the lower world. Thus the circle (igul) indicates an encompassing mode of government without differentiation in terms of Kindness, Judgment and Mercy, but rather, like a general, overall providence reflecting the distinctive quality of the particular Sefirah seen in this form. This is from the standpoint of causal development (hishtalshelut). On the other hand, the straight or upright form (yosher) indicates detailed government varying according to the requirements of Kindness, Judgment and Mercy – right, left and center. The same approach applies to all the other forms seen in the prophetic vision.
Symbolic Forms Seen in Prophetic Visions
Kalach Pitchei Chokhmah 13:2