The prophet Isaiah once described his summons to the heavenly throne to stand before God and receive his prophetic commission. He saw “the Lord sitting upon a throne, high and lifted up” (Isaiah 6:1-2). Around the throne, Isaiah saw seraphim, six-winged beings, which sang an endless refrain: “Holy, holy, holy is the Lord of hosts; the whole earth is full of his glory” (Isaiah 6:3).That Isaiah saw one God upon the throne is no shock to us given the decidedly monotheistic shape of the Hebrew faith…