The following is my translation of the notes and useful applications for the Second Reading (the Epistle Reading) of the Ember Wednesday of Advent, Isaiah 7:10–15, as they are found in Das Weimarische Bibelwerk (1877). Square brackets indicate my own notes and additions. For the useful applications, I recommend the reader see this very helpful article by Dr. Benjamin T. G. Mayes.

II. [Isaiah] deals with the sign which God offered to them, but which Ahaz did not want to request, on account of which the Lord punished him and named the sign, namely, the birth of Christ, or the consolation in the coming Immanuel. (v. 10–16)
Annotated Text
10. And the Lord spoke once more to Ahaz (through the prophet Isaiah), and said:
11. “Ask for a sign of the Lord, your God (to convince you that what I have now said is God’s Word and the truth), be it below in the depths, or above in the heights (whether it be here on earth or above in heaven, so shall it happen; for I am the almighty God, and nothing is impossible for me, Luke 1:37).
1 Hebrew: “turn yourself downward into the depth and ask, or turn yourself upward into the height” (You are free to demand a miraculous sign from wherever you want.)
12. But Ahaz said (from an unbelieving heart and with a hypocritical mouth), “I will not ask (hereby Ahaz despises all those things which the prophet had promised him by God’s command, and in order to whitewash his hypocrisy, he says), for I will not test the Lord (he points to Scripture and thereby mocks the prophet’s offer, as if it were contrary to God’s Word, since in Scripture it is forbidden to tempt God the Lord by demanding a sign, Deuteronomy 6:16. Now it is one thing to demand a sign out of unbelief or presumption, and at an importune moment, without need and without a command from God; but is another thing to accept a sign which God Himself offers in order to strengthen the faith of men in order to thank Him and in due obedience).
(Matthew 12:38; John 4:48)
13. Then he said (the prophet Isaiah), “Well then, here then you of the house of David: Is it a small thing for you to insult the people (the priest mocks and skins the subjects), that you must (out of the impulse of your wicked heart) also insult my God?1 (in that you reject His Word and gracious promise and thereby want to make Him a liar, so much as it is within you).
1 Hebrew: “to cause trouble” (through so much futile offering and vain apologizing)
14. Therefore, the Lord Himself will give you a sign1: Behold, a * virgin2 shall conceive (which is above all nature and contrary to its ordinary course), and will give birth to a Son (who is Christ), whom they will call3 † Immanuel (“God with us,” who is God and true man together in one person; who is the foundation of all the promises of God, 2 Corinthians 1:20, and is the faithful testimony of divine love and grace toward us men, Revelation 1:5).
* Matthew 1:23; Luke 1:31; Micah 5:2
† Isaiah 8:8, 10
1 A supernatural miracle, which although still in the future, was nevertheless an absolute truth among the Jews (see Genesis 3:12; 2 Kings 19:29; Matthew 12:39ff.). At the very least, the house of Judah and David had to be preserved until this Son was born.
2 This Hebrew word signifies a virgin according to its origin and established use. Otherwise, the matter could not have provided a miraculous sign.
3 To be called a name often signifies that very fact. [i.e., Christ is truly, not figuratively, “God with us.”] See Isaiah 1:26, 9:6, 56:7; Jeremiah 3:17; Zechariah 6:12, 8:3; Luke 1:25, etc.
15. He will eat butter and honey (He will be reared in such a common manner and way, as any other boy in the Jewish land), that He might know to reject evil and to choose the good (so long until He comes into His full age, and then can distinguish between good and evil, which happened during the time that He carried out His teaching office on earth, to which He was consecrated at His baptism through divine revelation, Matthew 3:16–17).1
* Hebrews 5:14 (Philippians 2:7)
1 * Until He comes to the years in which children learn to understand the distinction between good and evil.
16. For before * the boy (namely, Immanuel) learns to reject evil and to choose good (before He is yet to be born and increases in age and wisdom, Luke 2:40, 52)1 the land which you dread (namely, the land of Syria and the ten tribes of Israel) will be forsaken by its two kings (for both Rezin and Pekah were slain before Ahaz had completed the fourth year of his reign [see 2 Kings 15:30, 16:9]).
* Isaiah 8:4 (v. 4)
1 * That is, before he comes to these years, or in a short time as a boy comes to His reason. Those who understand such words as concerning the small boy Shear-Jashub [Isaiah 7:3] standing there, to whom the prophet pointed with his finger, come even closer to the matter and to the shortness of the time.
Useful Applications
II. DOCTRINE: That the Son of God was conceived by the Holy Spirit and born of the Virgin Mary for our redemption. (v. 14)

