Like Ahaz before us, we don’t want a sign from God--at least a sign that leaves God running the show. What Ahaz did on the outside, we do on the inside. We like things just the way they are, if it leaves us in charge.
Isaiah’s prophecy of the Virgin giving birth was a sign against King Ahaz. It’s also a sign against us, all fallen humanity. Ahaz was a young Israelite man gone bad. He was of David’s line, but not of David’s faith. And he had become king of the Southern kingdom of Israel, Judah.