HERE is a prophecy from the Old Testament which Matthew uses to account for the way Jesus reacted to the animosity of the Pharisees against him for healing a man with a shrivalled hand on the Sabbath. Also this prophecy from the Old Testament opens up to us the glorious and wonderful purpose of Jesus, acting as the servant of the Lord, to perform the monumental work of God Jesus was sent into the world to perform. Because Mathhew makes clear that Jesus was the fulfilment of this prophecy in Isaiah, we may be sure that 'the servant of the Lord' in the prophecies of Isaiah refer to our Lord Jesus Christ.
This prophecy is wonderful good news to sinners who cry to God for mercy and forgiveness. God is omnipotent and omniscient. This means that nothing is impossible to him. The record of creation in Genesis chapter 1 is entirely possible. The first verse of this chapter sees God in isolation before the unverse ever existed, and goes on to declare that God brought matter into being which was non-existent before God created it, and with which be constructed the universe, including time, as we know it. All things are possible to him. God has only to decided to create, perform, make, and it is done. But there is one thing that it impossible to God. Because God's Character is holy, he is anable to act in discord with his being. This means that God can not overlook anything which falls short of the glory of his holy being. So he must in holy justice condemn to everlasting death all and everyone that falls short of his holiness.
Yet God is love and wants to forgive sinners, but he must do it justly. This prophecy tell us that God entered his world in the person of his only begotten Son, in order to proclaim justice to the nations, and lead justice to victory. This is telling us fallen condemned sinners that God sent Jesus into the world to satisfy completely his holy justice, so that he could justly forgive and save sinners who repent and plead for his mercy.
So Jesus had to be born a humn being in the same way as we are born. Then Jesus had to live a completely holy life. To do this he had to overcome all the temptations of Satan, being victorious where Adam failed. Then he had to take responsibility before his Father, most holy God. Then he had to suffer all God's holy justice for our sins to uphold, in our place, the justice of God.
So in this way he proclaimed justice to the nations, the justice of the most holy one and only God, creator of heaven and earth; and so he leads justice to victory for all sinners who in deep sorrow for falling short of God's holy justice, cry to him to be merciful to them as sinners. This is the message of Christmas declared in the song of the angels to the shepherds - 'Unto you is born this day, a Saviour, who is Christ the Lord'. All who have been led to put their trust in Jesus as their Saviour and sin-bearer, they and they alone know the true joy of Christmas.