2. What God here promises to him upon the performance of these conditions. If he approve himself well, (1.) God will tranquilize his mind and pacify the present tumult of his spirits: If thou return, I will bring thee again, will restore thy soul, as Ps. xxiii. 3. The best and strongest saints, if at any time they have gone aside out of the right way, and are determined to return, need the grace of God to bring them again. (2.) God will employ him in his service as a prophet, whose work, even in those bad times, had comfort and honour enough in it to be its own wages: "Thou shalt stand before me, to receive instructions from me, as a servant from his master; and thou shalt be as my mouth to deliver my messages to the people, as an ambassador is the mouth of the prince that sends him." Note, Faithful ministers are God's mouth to us; they are so to look upon themselves, and to speak God's mind and as becomes the oracles of God; and we are so to look upon them, and to hear God speaking to us by them. Observe, If thou keep close to thy instructions, thou shalt be as my mouth, not otherwise; so far, and no further, God will stand by ministers, as they go by the written word. "Thou shalt be as my mouth, that is, what thou sayest shall be made good, as if I myself had said it." See Isa. xliv. 26; 1 Sam. iii. 19. (3.) He shall have strength and courage to face the many difficulties he meets with in his work, and his spirit shall not fail again as now it does (v. 20): "I will make thee unto this people as a fenced brazen wall, which the storm batters and beats violently upon, but cannot shake. Return not thou to them by any sinful compliances, and then trust thy God to arm thee by his grace with holy resolutions. Be not cowardly, and God will make thee daring." He had complained that he was made a man of strife. "Expect to be so (says God); they will fight against thee, they will still continue their opposition, but they shall not prevail against thee to drive thee off from thy work nor to cut thee off from the land of the living." (4.) He shall have God for his protector and mighty deliverer: I am with thee to save thee. Those that have God with them have a Saviour with them who has wisdom and strength enough to deal with the most formidable enemy; and those that are with God, and faithful to him, he will deliver (v. 21) either from trouble or through it. They may perhaps fall into the hand of the wicked, and they may appear terrible to them, but God will rescue them out of their hands. They shall not be able to kill them till they have finished their testimony; they shall not prevent their happiness. God will so deliver them as to preserve them to his heavenly kingdom (2 Tim. iv. 18), and that is deliverance enough. There are many things that appear very frightful that yet do not prove at all hurtful to a good man.