Isaiah 40:5
And the glory of the LORD shall be revealed, and all flesh shall see it together: for the mouth of the LORD hath spoken it.
And the glory of the LORD shall be revealed..... Christ himself, who is the brightness of his Father's glory, and his own glory, as the glory of the of the only begotten of the Father; the glorious perfections of his nature, seen in the miracles wrought, and in the doctrines taught by him; the glory of the divine Father, in the face or person of Christ; and the glory of his attributes, in the work of salvation by him; all which is most clearly discerned in the glass of the Gospel, or in the ministry of the word, by John, Christ himself, and his apostles:
and all flesh shall see it together; not the Jews only, but Gentiles also; not with their bodily eyes, but with the eyes of their understanding; even the salvation of the Lord, and his glory, as displayed in it, being set forth in the everlasting Gospel to the view of all; see Luke 3:7,
for the mouth of the LORD hath spoken it: that his glory should be revealed, and be visible to all, and therefore sure and certain; for what he has said he does, and what he has spoken he makes good. The Targum is,
"for by the word of the Lord it is so decreed;''
and therefore shall be fulfilled.