So, Isaiah tells Ahaz and us that God will give a sign. “Therefore the Lord Himself will give you a sign. Behold, the virgin shall conceive and bear a son, and shall call his name Immanuel. He shall eat curds and honey when He knows how to refuse the evil and choose the good.” (Isaiah 7: 14 – 15)
The Son of God comes as “a great light.” (Isaiah 9: 2) He comes as “Wonderful Counselor, Mighty God, Everlasting Father, Prince of Peace.” (Isaiah 9: 6)
When Mary and Joseph present their son as holy to the Lord on the eighth day of his life — offering a pair of turtledoves — Simeon, a “righteous and devout” man who is “waiting for the consolation of Israel,” sees Jesus. When Simeon sees the Christ child, he takes Him in his arms, saying: “Lord, now You are letting Your servant depart in peace, according to Your Word; for my eyes have seen Your salvation that You have prepared in the presence of all peoples, a light for revelation for the Gentiles, and for glory to Your people Israel.” (Luke 2: 25, 29 – 32)
Simeon lays eyes on the sign which God promises to Ahaz, and which Ahaz does not request.
Simeon tells Mary, “Behold, this child is appointed for the fall and rise of many in Israel, and for a sign that is opposed, so that the thoughts from many hearts may be revealed.” (Luke 2: 34, 35)
Jesus is a sign that is opposed.
Jesus Himself warns, “An evil and adulterous generation seeks for a sign, but no sign will be given to it except the sign of Jonah.” (Matthew 16: 4)
The two signs God gives us are the virgin birth of Jesus and the resurrection of Christ.