The Gospel of Philip 78

1The children to whom a woman gives birth will look like the man she loves. If it's her husband, they look like her husband; if it's an adulterer, they look like the adulterer. Often, if a woman sleeps with her husband because she has to, but her heart is with the adulterer with whom she is intimate and she bears a child, the child she bears looks like the adulterer. But you who exist with the Son of God, don't love the world; rather, love the Lord, so that those you'll beget may not come to look like the world, but will come to look like the Lord.
2The human unites with the human, the horse unites with the horse, the donkey unites with the donkey. Species unite [with] similar species. That's what it's like when spirit unites with spirit, the [Word] is intimate with the Word, [and light is] intimate [with light. If you] become human, [it's the human who will] love you. If you become [spirit], it's the Spirit who will unite with you. [If] you become Word, it's the Word that will unite with you. If [you] become light, it's the light which will be intimate with you. If you become one of those from above, those from above will rest upon you. If you become horse or donkey or calf or dog or sheep or any other of the animals which are outside or below, neither human nor spirit nor Word nor light nor those from above nor those inside will be able to love you. They won't be able to rest within you, and you'll have no part in them.