HH see Likutay Moharan 24. See klalim rishonim of Ramchal #3 that the center of the Ain Sof is His unity. Put the two together.
This is about Rabbi Nachman of Bresluv (Breslov, Bratslov), now known as Na Nach Nachmu Nachmun MayUman! This is about his chasid and chief disciple Rabbi Natan, it's about the Saba, the Baal HaPetek.