Matthew 12:18 “Behold! My Servant whom I have chosen, My Beloved in whom My soul is well pleased! I will put My Spirit upon Him, And He will declare justice to the Gentiles.
These are the prophetic words from Isaiah which were to be spoken by God the Father about Christ Jesus; words to be directed to the church.
These words would be spoken by God because Go has already promised these words through His prophet.
God is Just and continues to uphold each and every promise He has made through the people chosen by Him at the time.
Jesus Christ, the chosen and beloved Son of God, our King, our Saviour and mediator.