That's another part of it, when you know yourself, when you are in tune with the body and mind, you can see more deeply how the body and mind works/functions, and you can gain deeper insight into what's going on. Harmalas, DMT, and as well as Cannabis, for example, tend to help me tune into the body and mind more deeply and then i can see what's going on internally, and so far i have been pretty spot on with what i've gained from insight/intuition (backed by studies and research as well so i'm not flying blind), and i'm pretty good at discerning and understanding things about the body and mind.