Hortus deliciarum Jesse tree

God the Father stands at the top left, holding a fishing rod with a line that descends through seven circular medallions containing the heads of Hebrew prophets and patriarchs. At the end of the line, Christ is shown on the cross, acting as the hook being swallowed by the monstrous Leviathan, which represents the devil. This diagrammatic image illustrates the 'hook of divinity' allegory, where Christ's humanity serves as a lure to trap evil.

This image visualizes the 'Hamus Divinitatis' (Hook of Divinity) theory of atonement, a significant medieval theological concept popularized by Gregory the Great and Peter Lombard. It interprets Job 41:1 ('Can you pull in Leviathan with a fishhook?') as a prophecy of Christ's victory over the devil through the disguise of his human incarnation.