1. The prophet, as a watchman, must take notice of what God said concerning this people, not only concerning the body of the people, to which the prophecies of Jeremiah and other prophets had most commonly reference, but concerning particular persons, according as their character was. He must not, as other watchmen, look round to spy danger and gain intelligence, but he must look up to God, and further he need not look: Hear the word at my mouth, v. 17. Note, Those that are to preach must first hear; for how can those teach others who have not first learned themselves?