Isaiah juxtaposes his sublime vision, call, and response with the less sublime story of his first mission. God sends him to Ahaz, the good Uzziah’s godless grandson, a man who ignored his heritage, defiled the Temple with an Assyrian altar, “sacrificed and burned incense on the high places and on the hills and under every green tree,” and even “made his son pass through the fire.”
Granade, S. Ray, "First Sunday of Advent "I Will Not Test God"" (1992). Creative Works. 24.