Here is my servant, whom I uphold, my chosen, in whom my soul delights; I have put my spirit upon him; he will bring forth justice to the nations. He will not cry or lift up his voice, or make it heard in the street; a bruised reed he will not break, and a dimly burning wick he will not quench; he will faithfully bring forth justice. He will not grow faint or be crushed until he has established justice in the earth; and the coastlands wait for his teaching. Thus says God, the Lord, who created the heavens and stretched them out, who spread out the earth and what comes from it, who gives breath to the people upon it and spirit to those who walk in it: I am the Lord, I have called you in righteousness, I have taken you by the hand and kept you; I have given you as a covenant to the people, a light to the nations, to open the eyes that are blind, to bring out the prisoners from the dungeon, from the prison those who sit in darkness. I am the Lord, that is my name; my glory I give to no other, nor my praise to idols. See, the former things have come to pass, and new things I now declare; before they spring forth, I tell you of them. (NRSV 42:1-9)
Behold! My Servant whom I uphold, My Elect One in whom My soul delights! I have put My Spirit upon Him; He will bring forth justice to the Gentiles. He will not cry out, nor raise His voice, Nor cause His voice to be heard in the street. A bruised reed He will not break, And smoking flax He will not quench; He will bring forth justice for truth. He will not fail nor be discouraged, Till He has established justice in the earth; And the coastlands shall wait for His law.
Thus says God the Lord, Who created the heavens and stretched them out, Who spread forth the earth and that which comes from it, Who gives breath to the people on it, And spirit to those who walk on it: I, the Lord, have called You in righteousness, And will hold Your hand; I will keep You and give You as a covenant to the people, As a light to the Gentiles, To open blind eyes, To bring out prisoners from the prison, Those who sit in darkness from the prison house. I am the Lord, that is My name; And My glory I will not give to another, Nor My praise to carved images. Behold, the former things have come to pass, And new things I declare; Before they spring forth I tell you of them. (KJV 42:1-9)
Here, Isaiah is imagining a redeemer, the "Suffering Servant"—whether that's a single person, or the righteous members of Israel pictured as one suffering person. It's a way of visualizing how the time of peace is going to all come together to make sure that all sins are paid off in a sensible way before that happens.