The concept of self-mastery suggests that the outcome of the ancient dictum 'Temet nosce' (know thyself) is part of a (once well-known?) psychological process,

The concept of self-mastery suggests that the outcome of the ancient dictum 'Temet nosce' (know thyself) is part of a (once well-known?) psychological process, of a liberation from ignorance. I see an echo of that in Jung's 'individuation'. I see other echoes in Gurdjieff & Ouspensky's writings, in the efforts of the (non-materialist) alchemists, in Maslow's 'self-actualization', in Bucke's 'cosmic consciousness', etc ... and that's just in the West. Huxley displays a somewhat more universal (but abstracted) outline of this constellation of efforts in his 1946 The Perennial Philosophy. Long ago I waded (not very deeply) into N., but as I recall, he explored a lot more than this one idea. Maybe he's become most identified with it because its other numerous threads are too esoteric ... or concealed. NB: One Jung take on Nietzsche (1936): https://www.philosopher.eu/others-writings/essay-on-wotan-w-nietzsche-c-g-jung/ https://www.philosopher.eu/others-writings/essay-on-wotan-w-...