The Book contains the gist of mystical teachings from Upanishads, Zen, Sufism, Kabbala, Buddhism and Taoism. Along with this, it covers the very essence of Semitic philosophy that is spread through Christianity, Islam and Judaism. The knowledge expressed through different ideologies cannot be vastly different; if the aspirant unravels the mysticism that is secretly encoded in their holy texts then truth can be found. Ramana Maharishi said, only one...