Isaiah 55:5

“Behold, thou shalt call a nation that thou knowest not, &c.] And even nations, as in the next clause; not all the individuals of them, though the Gospel is sent to all nations; and in the latter day the kingdoms of this world shall be the Lord’s, and all nations shall serve him. It denotes a great concourse of people to Christ, even such as were not known by him: he knows all mankind as he is the omniscient God, and especially them that are his, these he has a special and peculiar knowledge of; he knows them as his beloved, chosen, and redeemed ones, even before conversion; and yet, in a sense, they are unknown to him before calling; they are not taken notice of by him in an open way; they…”

“thou--Jehovah addresses Messiah. call . . . run--God must call, before man can, or will, run (Sol 1:4; Joh 6:44). Not merely come, but run eagerly. thou knowest not--now as thy people (so in Mat 7:23). nation . . . nations--gradation; from Israel, one nation, the Gospel spread to many nations, and will do so more fully on Israel's conversion. knew not thee-- (Isa 52:15; Eph 2:11-12). because of . . . thy God . . . glorified thee-- (Isa 60:5, Isa 60:9; Zac 8:23); where similar language is directed to Israel, because of the identification of Israel with Messiah, who is the ideal Israel (Mat 2:15; compare with Hos 11:1; see Act 3:13).”

“Behold, thou shalt call ... - This is evidently an address to the Messiah, and is a promise that the Gentiles should be called by him to the fellowship of the gospel. That thou knowest not - The phrase ‘thou knowest not,’ means a nation that had not been regarded as his own people. And nations that knew not thee - The pagan nations that were strangers to thee. Shall run unto thee - Indicating the haste and anxiety which they would have to partake of the benefits of the true religion. Because of the Lord thy God - From respect to the God who had appointed the Messiah, and who had organized the Church. For he hath glorified thee - John 16:5. God had glorified him by appointing him to be the…”

“Thou - Thou, O Messiah. Call - To the knowledge of thyself. Knewest not - With that special knowledge which implies approbation. Because - Because the Lord shall by many tokens, manifest himself to be thy God, and thee to be his son and faithful servant. Glorify thee - By confirming thy word with illustrious signs and miracles, and particularly by thy resurrection, and glorious ascension. Isaiah 55:6”

“thou shalt: Isa 11:10, Isa 11:11, Isa 52:15, Isa 56:8; Gen 49:10; Psa 18:43; Rom 15:20; Eph 2:11, Eph 3:5 nation: Isa 60:5; Hos 1:10; Zac 2:11, Zac 8:20-23 he: Isa 60:9; Psa 110:1-3; Luk 24:26; Joh 13:31, Joh 13:32, Joh 17:1; Act 3:13, Act 5:31; Heb 5:5; Pe1 1:11 Isaiah 55:6”