(2.) That we may with the greatest assurance depend upon God for the safety of his church, we have here, [1.] The power of God over the church's enemies asserted, v. 16. The truth is they have no power but what is given them from above, and he that gave them their power can limit and restrain them. Hitherto they shall go, and no further. First, They cannot carry on their design without arms and weapons of war; and the smith that makes those weapons is God's creature, and he gave him his skill to work in iron and brass (Exod. xxxi. 3, 4) and particularly to make proper instruments for warlike purposes. It is melancholy to think, as if men did not die fast enough of themselves, how ingenious and industrious they are to make instruments of death and to find out ways and means to kill one another. The smith blows the coals in the fire, to make his iron malleable, to soften it first, that it may be hardened into steel, and so he may bring forth an instrument proper for the work of those that seek to destroy. It is the iron age that is the age of war. But God has created the smith, and therefore can tie his hands, so that the project of the enemy shall miscarry (as many a project has done) for want of arms and ammunition. Or the smith that forges the weapons is perhaps put here for the council of war that forms the design, blows the coals of contention, and brings forth the plan of the war; these can do no more than God will let them. Secondly, They cannot carry it on without men, they must have soldiers, and it is God that created the waster to destroy. Military men value themselves upon their great offices and splendid titles, and even the common soldiers call themselves gentlemen; but God calls them wasters made to destroy, for wasting and destruction are their business. They think their own ingenuity, labour, and experience, made them soldiers; but it was God that created them, and gave them strength and spirit for that hazardous employment; and therefore he not only can restrain them, but will serve his own purposes and designs by them. [2.] The promise of God concerning the church's safety solemnly laid down, as the heritage of the servants of the Lord (v. 17), as that which they may depend upon and be confident of, that God will protect them from their adversaries both in camps and courts. First, From their field-adversaries, that think to destroy them by force and violence, and dint of sword: "No weapon that is formed against thee (though ever so artfully formed by the smith that blows the coals, v. 16, though ever so skilfully managed by the waster that seeks to destroy) shall prosper; it shall not prove strong enough to do any harm to the people of God; it shall miss its mark, shall fall out of the hand or perhaps recoil in the face of him that uses it against thee." It is the happiness of the church that no weapons formed against it shall prosper long, and therefore the folly of its enemies will at length be made manifest to all, for they are but preparing instruments of ruin for themselves. Secondly, From their law-adversaries, that think to run them down under colour of right and justice. When the weapons of war do not prosper there are tongues that rise in judgment. Both are included in the gates of hell, that seek to destroy the church; for they had their courts of justice, as well as their magazines and military stores, in their gates. The tongues that rise in judgment against the church are as such as either demand a dominion over it, as if God's children were their lawful captives, pretending an authority to oppress their consciences, or they are such as misrepresent them, and falsely accuse them, and by slanders and calumnies endeavour to make them odious to the people and obnoxious to the government. This the enemies of the Jews did, to incense the kings of Persia against them, Ezra iv. 12; Esth. iii. 8. "But these insulting threatening tongues thou shalt condemn; thou shalt have wherewith to answer their insolent demands, and to put to silence their malicious reflections. Thou shalt do it by well-doing (1 Pet. ii. 15), by doing that which will make thee manifest in the consciences even of thy adversaries, that thou art not what thou art represented to be. Thou shalt condemn them, that is, God shall condemn them for thee. He shall bring forth thy righteousness as the light, Ps. xxxvii. 6. Thou shalt condemn them as Noah condemned the old world that reproached him, by building the ark, and so saving his house, in contempt of their contempts." The day is coming when God will reckon with the wicked men for all their hard speeches which they have spoken against him, Jude 15.