Raso washov, from Yehezqel 1:14, meaning 'running/going out and returning'. This concept is mentioned multiple times by R' Nahman in Liquttei Moharan, at least in 6, 13 and 79 of the first part.
(Sorry for these westernized renditions of Yehezqel's vision. They're entertaining, at least.)
While Rabenu offers fresh, original, and new hidushim on this concept from one Torah to the next, I just understood a very practical understanding of this concept that is something based mostly on what Torah 6 of L"M teaches about it.
