2:6-9 If God will build Jerusalem for the people and their comfort, they must inhabit it for him and his glory. The promises and privileges with which God's people are blessed, should engage us to join them, whatever it costs us. When Zion is enlarged to make room for all God's Israel, it is the greatest madness for any of them to stay in Babylon. The captivity of a sinful state is by no means to be continued in, though a man may be easy in worldly matters. Escape for thy life, look not behind thee. Christ has proclaimed that deliverance to the captives, which he has himself wrought out, and it concerns every one to resolve that sin shall not have dominion over him. Those who would be found among God's children, must save themselves from this world, see Ac 2:40. What Christ will do for his church, shall be an evident proof of God's care and affection. He that touches you, touches the apple of his eye. This is a strong expression of God's love to his church. He takes what is done against her as done against the tenderest part of the eye, to which the least touch is a great offence. Christ is sent to be the Protector of his church.
7. O Zion … daughter of Babylon—Thou whose only sure dwelling is "Zion," inseparably connected with the temple, art altogether out of thy place in "dwelling with the daughter of Babylon" (that is, Babylon and her people, Ps 137:8; Isa 1:8).
After the glory—After restoring the "glory" (Zec 2:5; Isa 4:5; Ro 9:4) of Jehovah's presence to Jerusalem, He (God the Father) hath commissioned ME (God the Son, Isa 48:16, the Divine Angel: God thus being at once the Sender and the Sent) to visit in wrath "the nations which spoiled you." Messiah's twofold office from the Father is: (1) to glorify His Church; (2) to punish its foes (2Th 1:7-10). Both offices manifest His glory (Pr 16:4).
toucheth … the apple of his eye—namely, of Jehovah's eye (De 32:10; Ps 17:8; Pr 7:2). The pupil, or aperture, through which rays pass to the retina, is the tenderest part of the eye; the member which we most sedulously guard from hurt as being the dearest of our members; the one which feels most acutely the slightest injury, and the loss of which is irreparable.