In cities, ministers and good men can readily and effectually co-operate in plans of usefulness. The inhabitants of smaller towns and villages are too scattered to allow of ready co-operation; but in our cities, a few minutes may assemble many of those who love the Lord. The dangers which threaten, or the hopes which gladden, quickly circulate. The weakness of one portion may be readily sustained by the greater strength of some other portion. In the multitude of professing Christians, may be found men of wisdom, of wealth, of enterprise, of leisure, of devotedness; all of whose varied gifts and talents may be concentrated for good. Surely these are advantages peculiar to cities. Too long have we looked upon the might of opposing interests, and neglected the power which God hath given us. Too long have churches stood alone, and feebly exerted their separate influences. But in a union of the efforts of churches the increase of power may be immense; for whilst "one shall chase a thousand, two shall put ten thousand to flight." It is by the means which cities afford for ready co-operation, that Satan and his followers have in all ages achieved so much. _They_ make common cause. They suffer no differences to divide their strength; knowing "that an house divided against itself cannot stand." They combine their forces, in any plan which promises injury to the Christian interest. Cities furnish to Christians the very same opportunities for united effort, and thus present peculiar advantages. Again, cities also furnish advantages for individual exertion. Here a minister's influence may at once reach, not merely to his own congregation, but far beyond. Every month he is brought in contact with some thousands, who may be affected by his faithfulness. And under his influence, many benevolent and pious institutions may rise and shine to bless the world.