Isaiah 62:6

I have set watchmen upon thy walls, O Jerusalem,.... Not angels, as Jarchi; nor kings, as Kimchi; nor princes and civil magistrates, as others; nor the mourners in Zion, as Aben Ezra; but ministers of the Gospel; as the prophets of the Old Testament are called watch men, Isaiah 21:11, so ministers of the New,

Isaiah 52:8 who are to watch in all things over themselves, and for the souls of men; for their good, and to guard them against that which is evil, pernicious, and dangerous, both in principle and practice, 2 Timothy 4:5. The allusion is to watchmen on the walls of cities, whose business is to keep their place and stand, and not move from it; to look out diligently, and descry an enemy, or any approaching danger, and give notice of it; and to defend the outworks of the city, and repel the enemy; all which requires courage, constancy, vigilance, and sobriety. The church is a city, and a walled one; God himself is a wall about her; salvation by Christ is as walls and bulwarks to her; and ministers of the Gospel are set for the defence of her: this is an ordinance and appointment of God; these watchmen are not of men's setting, nor do they take this office to themselves; but are placed in it by the Lord, who makes them able ministers, qualifies them for watchmen, and enables them to perform their work; and which is an instance of the love of God to his church, and of his care of it:

which shall never hold their peace day nor night; as the living creatures in Revelation 4:8, which are an emblem of Gospel ministers; who are always to be employed, and to be continually praying or preaching; the two principal branches of their ministry, Acts 6:4, they are not to be silent, but either praying in private or in public for direction and assistance in their meditations; for supply of the gifts and graces of the Spirit in their ministration, and for success in their work; and that all blessings of grace might descend on those to whom they minister: or else preaching the Gospel; being constant in season, and out of season; frequently inculcating the doctrines of Christ; constantly affirming these things; ever informing, instructing, and exhorting the people. It was Austin's wish that death might find him either praying or preaching:

ye that make mention of the Lord, keep not silence; some take this to be an address to the same persons; and they may be described as such that make mention of the Lord in their ministrations; of the grace and love of God the Father; of the person, office, and grace of Christ; and of the operations of the Spirit: or, "as the remembrancers of the Lord" i, as it may be rendered; that put men in mind of the Lord; of what he has done for them, and is unto them; of the doctrines of the Gospel respecting him, and of their duty to him, and to one another, and to all men; and who put the Lord in mind of his promises to his people, and prophecies concerning them, to fulfil them: but I rather think another set of men are meant, even members of churches, as distinct from ministers; who make mention of the Lord to one another, in private conference with each other; of his gracious dealings with them, and favours bestowed upon them; and who make mention of him in their prayers to him, and praises of him; and who should not keep silence, but pray without ceasing, even always, and not faint, Luke 18:1.

i המזכירים את יהוה "qui Deo estis a memoriis", Gataker; "qui facitis ut alii reminiscantur Domini", Forerius.