This was to fulfil what was spoken by the prophet Isaiah:
"Behold, my servant whom I have chosen, my beloved with whom my soul is well pleased. I will put my Spirit upon him, and he shall proclaim justice to the Gentiles.
He will not wrangle or cry aloud, nor will any one hear his voice in the streets;
he will not break a bruised reed or quench a smoldering wick, till he brings justice to victory;
and in his name will the Gentiles hope."