"The energy levels of the Tantric universe are generally represented as a set of concentric circles (cakras) of hypostasized forms of the divine energy which, in addition to appearing as an array of divine enlightened, perfected , demonic, human or animal beings, also manifest themselves on an acoustic level, as garlands or piled-up aggregates of phonemes (mantras), on a graphic level, as the written characters of the hieratic alphabets and as the hierarchized cakras of the yogi body."