When our Lord Jesus promised to send the Comforter he added, When he shall come he shall convince ( John 16:7 , 8 ); for conviction must prepare for comfort, and must also separate between the precious and the vile, and mark out those to whom comfort does not belong. God had appointed this prophet to comfort his people (Isa. 40:1); here he appoints him to convince them, and show them their sins. I...