He will go before him in the spirit and power of Elijah, 'to turn the hearts of the fathers to the children,' and the disobedient to the wisdom of the just; to make ready a people prepared for the Lord."
To make ready a people ... - To prepare them for his coming by announcing that the Messiah was about to appear, and by calling them to repentance. God has always required people to be pure in a special manner when he was about to appear among them. Thus, the Israelites were required to purify themselves for three days when he was about to come down on Mount Sinai, Exodus 19:14-15. And so, when God the Son was about to appear as the Redeemer, he required that people should “prepare” themselves for his coming. So in view of the future judgment - the second coming of the Son of man - he requires that people should repent, believe, and be pure, 1 Peter 4:7; 2 Peter 3:11-12.