The Sefirot shine with two kinds of direct and returning light:
(1) After the descent of the Sefirot level by level from Keter to Malchut, Malchut in turn becomes Keter, and so on in the same way until Keter becomes Malchut. This shows the absolute control and perfection of Eyn Sof. For everything emanates from Him, and He is the end goal of everything, as it says: “I am first and I am last” (Isaiah 44:6). He is revealed as such at the beginning as at the end. The closer any given level is to Him, the more it is magnified with His Name, and what was Malchut becomes Keter.