The figure of the Servant of the Lord most certainly points ahead to Jesus Christ. He observed that his preaching and teaching were administered not on his own authority, but as words that the Father had taught him (John 8:28). In other words, the words on his tongue were given him by the Lord God (Isaiah 50:4). And he set out to deliver such words especially to the weary, those overwhelmed and burdened by afflictions of any sort. In compassion he exhorted them, Come to me, all who labor and are heavy laden, and I will give you rest
(Matthew 11:28). Therefore, God had awakened his ear to be taught, so that he may be able to soothe wretched men by appropriate consolation, that by means of it their dejected hearts may be encouraged by feeling the mercy of God.
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This Servant could also testify that he was not rebellious, and did not turn from his mission. He declared at one time, He who sent me is with him. He has not left me alone, for I always do the things that are pleasing to him
(John 8:29). That means he perfectly responded to the work of the Lord by following his will always. Not Israel, nor any other prophet could declare anything like this; even men like Moses (Exodus 4:13) and Jeremiah (Jeremiah 20:9, Jeremiah 20:14) at times resisted the Lord’s claim upon their lives. Only Jesus could legitimately say he never rebelled against God.2
4 The Lord GOD has given me the tongue of those who are taught, that I may know how to sustain with a word him who is weary. Morning by morning he awakens; he awakens my ear to hear as those who are taught.