If “the most fertile region in the mind’s inner landscape is the marshy shore between sleep and full awakening” (Koestler) how do we we remain in that zone without mentally moving one way or the other? I do it by drifting into Alpha brain state then describing in my mind the pictures I see. If I describe them in too much detail - a rational activity - they melt away. If I don’t describe them, they develop a life of their own beyond my direct control, obviously the beginning of a dream. What do you do?