Cao Dai teaches that before God existed, there was Tao. Tao is the unchanging, nameless, formless, immortal source. Then the Big Bang occurred, and out of the Big Bang, God miraculously blessed us with his birth and was poured onto us from the universe ( emanationism ). The Universe could not be formed so the Yin Yang were created by the Almighty himself. Like Adam took one of his ribs to create Eve, God took control of yang and a part of himself, thereby creating the Goddess to assemble with yin. Now that the Union was completed, the Universe was formed. The Goddess, Holy Mother, is referred by Caodaiist as Mother Buddha. Cao Dai teaches that there are 36 levels of Heaven, and 72 planets having intelligent life. The first planet is closest to Heaven while number 72 is closest to Hell. Earth is number 68.