Some say that all gods and all living creatures originated in the stream of Oceanus and that Thetys was their mother, but the Orphics say that Night was courted by the Wind and laid a silver egg in the womb of Darkness. From this egg hatched Eros, who set the Universe in motion.
Eros was double-sexed, golden-winged and had four heads. The son created earth, sky, sun and moon, but the mother, manifesting herself as Night, Order and Justice ruled the universe until her scepter passed to Uranus.
Robert Graves, The Greek Myths. Complete Edition.