AHYMSIN

" Careful vigilance and observation lead the student to study the incoming thoughts from the unconscious mind. The yogis recall all their samskaras, watch them, examine, and even select and reject them according to their need. Those thought patterns that are disturbing are rejected by the yogis, and those that are helpful are strengthened. A deep study of these three states-waking, dreaming, and sleeping-reveals that, with the help and practice of yoga nidra, one can go beyond all the levels of the unconscious. "