Isaiah 50:4

The learned. Literally, “the learners,” or “the disciples.” This verse introduces a new section. Jesus, the “Servant” (see on ch. 41:8) of Jehovah, here declares His devotion to the task before Him — His earthly mission. He comes as a Teacher of men, yet He is, in turn, instructed by the Father (see John 3:2; John 5:19; John 8:28; DA 208, 417).

That I should know how. Before Christ came to this earth five plan for His life “lay out before Him, perfect in all its details”; nevertheless, living as a man among men, He laid aside His foreknowledge of these things and was guided by the Father’s will as it was unfolded to Him day by day (DA 147; see on Luke 2:49). This fact makes even more meaningful the many occasions on which it is recorded that Jesus spent entire nights in prayer (see on Mark 3:13).

To speak a word. The Messiah would come into the world as the living “Word” (John 1:1), or spokesman for God, and His constant mission was to comfort and instruct those who were weary of sin (Matt. 11:28). See DA 208, 417; COL 139, 336. Apart from the salvation so graciously provided by Christ, the restless hearts of sinful men can never be at peace.