Isaiah 51:12

“I, even I, am he that comforteth you, &c.] This is an answer to the prayer of the prophet, or the church by him, in which the Lord promises not only assistance and help, but comfort; not only to exert his power and show his great strength by making bare his arm; but to open his heart, unbosom himself, and show his great love and strong affection for them; and so administer divine comforts unto them, giving more than was asked for: and he promises to do it himself, not by his prophets and ministers, word and ordinances, though these are the usual means; but he himself would do it by his Spirit and grace, and the immediate discoveries of his love; and which he repeats, to show the certainty of…”

“comforteth-- (Isa 51:3; Isa 40:1). thou--Zion. son of man--frail and dying as his parent Adam. be made as grass--wither as grass (Isa 40:6-7).”

“I even I am he that comforteth you - The word ‘I’ is repeated here to give emphasis to the passage, and to impress deeply upon them the fact that their consolation came alone from God. The argument is, that since God was their protector and friend, they had no occasion to fear anything that man could do. Of a man that shall die - God your comforter will endure forever. But all men - even the most mighty - must soon die. And if God is our protector, what occasion can we have to fear what a mere mortal can do to us? And of the son of man - This phrase is common in the Hebrew Scriptures, and means the same as man. Shall be made as grass - They shall perish as grass does that is cut down at…”

“am he: Isa 51:3, Isa 43:25, Isa 57:15-18, Isa 66:13; Joh 14:18, Joh 14:26, Joh 14:27; Act 9:31; Co2 1:3-5; Co2 7:5, Co2 7:6 that thou: Isa 51:7, Isa 51:8, Isa 2:22; Psa 118:6, Psa 146:4; Pro 29:26; Dan 3:16-18; Mat 10:28; Luk 12:4, Luk 12:5 man which: Isa 40:6; Psa 90:5, Psa 90:6, Psa 92:7, Psa 103:15, Psa 103:16; Jam 1:10, Jam 1:11; Pe1 1:24 Isaiah 51:13”

“In the second half the promise commences again, but with more distinct reference to the oppression of the exiles and the sufferings of Jerusalem. Jehovah Himself begins to speak now, setting His seal upon what is longed and hoped for. "I am your comforter: who art thou, that thou shouldst be afraid of a mortal who will die, and of a son of man who is made a blade of grass; that thou shouldst forget Jehovah thy Creator, who stretched out the heavens and founded the earth; that thou shouldst be afraid continually all the day of the fury of the tormentor, as he aims to destroy? and where is the fury of the tormentor left? He that is bowed down is quickly set loose, and does not die to the…”