I have a long list of things I've been meaning to study. I think I may finally start on it. Now it is Gurdjieff.
"The 4th Way (sometimes called "the way of the sly man"), emphasizes more
direct practices (such as "self-remembering" and "self-observation"), and
balanced development of the physical, emotional, and intellectual capacities."
"Generally only one "I" is in the "driver's seat" at a time. We
"become" one "I" after another, sometimes shifting quite rapidly.
The constant shifting among them makes concentration for extended
periods of time impossible, preventing us from reaching our
potential. A major goal of the 4th Way is achieving a
"permanent 'I'": unchanging control over attention."
the 4th wayfourth way on wikipedia