What's Good for the Goose

From this article:

The power to prevent the birth of homosexually oriented offspring will also mean that gay (or deaf or dwarf) parents can engineer children to be like them. The Times had a piece on this last month. It will be particularly interesting to see the reaction of the children who were engineered by their parents to be deaf or gay or dwarves.

Isn't there a fable or story or something about the perils of knowing the mind of God? It seems the more we delve into the workings of life, the more we find ourselves faced with dilemmas we're hardly capable of comprehending.