And all flesh shall see the salvation of God. "By the salvation of God" is meant, the Messiah, the Lord Jesus Christ, the Saviour of God's appointing and sending; and who is the author of that salvation which God resolved on, contrived, and approved of; and is his ordinance for salvation, unto the ends of the earth, for all his elect; Luke 2:30 whom a great number among the Jews should, and did see, with their bodily eyes; and whom not only God's elect among them, but also all of them among the Gentiles, should behold with an eye of faith, for themselves, as their Saviour and Redeemer. It is matter of question, what passage is here referred to; whether Isaiah 40:5 or Isaiah 3:10 the latter comes nearest to the words, and the former stands closely connected with the expressions before cited; though it is usual with the New Testament writers, to join together passages, which stand in different places of the same prophet, and even which are in different books; Romans 9:33 compared with Isaiah 8:14 and Matthew 21:5 compared with Isaiah 62:11 and that agreeably to the method used by Jewish writers (r).
(r) Vid. Surenhus. Biblos Katallages, de modis Allegandi, &c. Thes. 7. p. 45, 46, 319.

all flesh, &c.--(quoted literally from the Septuagint of Isaiah 40:5). The idea is that every obstruction shall be so removed as to reveal to the whole world the Salvation of God in Him whose name is the "Saviour" (compare Psalm 98:3; Isaiah 11:10; Isaiah 49:6; Isaiah 52:10; Luke 2:31-32; Acts 13:47).

The salvation of God - The Saviour, the Messiah.