Neurologists are baffled by their investigations into the brain. In one magazine, a researcher writes: ” . . . the brain thinks about itself as it thinks about itself thinking about itself.” This seems to be a riddle and it is, if one tries to understand mental processes by investigating only the brain organ. The riddle ceases to be a riddle when one considers the functioning of the more subtle instrument – the mind and consciousness.”

Swami Satyananda Saraswati: Yoga and Kriya (1981.)