Learn the ways people have tried to read this as a non-messianic passage and how that is, at best, a stretch beyond evidence and reason. The perspective is a future believing Jewish remnant looking back with an element of confession on the One they failed to recognize and the nation’s rejection that followed. Compare the imagery in The Arm of the Lord, Tender Shoot and Man of Sorrows. See how historical relevance of these terms points to the Messianic view. Contrast the Jewish expectations from Messiah and the Servant who actually came. Rejection ultimately shifts to glory revealing the substitutionary atonement and affirmation of what the Servant has accomplished.