“Of all emblems, the circle or ‘tondo’ is the most soaked with meaning. From dimmest pre-history, it has symbolized the sun, whose power, in one disguise or another, flows through all matter. It represents, too, the seed and the cell, the head, the halo and the corona, bodily orifices, Zodiac wheels, the earth, the eye, and the egg, the unbroken cycle of life and the continuity of consciousness . . . as well as what Tibetans call the ‘mysterious golden flower of the soul.’”