Robert Fludd - Under Your Wings, “Utriusque Cosmi”, 1621.

King David kneels before the Highest saying: “Under the Shadow of your wings I rejoice” (Psalm 63:7). The theme recalls the Rosicrucian manifesto of 1614 that ended with similar words: “Sub umbra alarum tuarum Jehovah”. The clouds have parted to let David see directly the Tetragrammaton, the unpronounceable word that the Jews refer to as Adonai (Lord) or simply as Shem (The Word). Fludd generally used these Hebrew letters to represent God in his diagrams. Kabbalists are easily accommodated to the doctrine of the Trinity: the three different letters Yod, He and Vau, which are interpreted as Father, Son and Holy Spirit.