And he looked at Barbelo with the pure light which surrounds the invisible Spirit, and (with) his spark, and she conceived from him. He begot a spark of light with a light resembling blessedness. But it does not equal his greatness. This was an only-begotten child of the Mother-Father which had come forth; it is the only offspring, the only-begotten one of the Father, the pure Light.
Apocryphon of John