In his early Christian work Against Heresies, one of the tactics of St. Irenaeus of Lyons uses is to take the logic of the Gnostic worldview he’s critiquing, and turn it on its head.

Because of the abstract nature of 2nd century Gnostic theology, it can be so nebulous that it’s hard to even understand how to begin to answer it.

But the point that St. Irenaeus makes is that Christianity has at its heart the incarnation of Jesus; and the denial of the incarnation was a primary assumption of the Gnostics, whose tendencies and logic still exist in many corners of even Christian theology today.