But perhaps even that is too definite and hard. And we are rather to think of the unseen but existent order of things or polity to which men here on earth may belong, and which will one day, after shocks and convulsions that shatter all which is merely institutional and human, be manifested still more gloriously.
The central thought that was moving in the prophet's mind is that of the indestructible vitality of the true Israel, and the order which it represented, of which Jerusalem on its rock was but to him a symbol. And thus for us the lesson is that, apart altogether from the existing and visible order of things in which we dwell, there is a polity to which we may belong, for 'ye are come unto Mount Zion, the city of the living God,' and that that order is indestructible. Convulsions come, every Babylon falls, all human institutions change and pass. 'The kingdoms old' are 'cast into another mould.' But persistent through them all, and at the last, high above them all, will stand the stable polity of Heaven, 'the city which hath the foundations.'
There is a lesson for us, brethren, in times of fluctuation, of change of opinion, of shaking of institutions, and of new social, economical, and political questions, threatening day by day to reorganise society. 'We have a strong city'; and whatever may come—and much destructive will come, and much that is venerable and antique, rooted in men's prejudices, and having survived through and oppressed the centuries, will have to go; but God's polity, His form of human society of which the perfect ideal and antitype, so to speak, lies concealed in the heavens, is everlasting. Therefore, whatsoever changes, whatsoever ancient and venerable things come to be regarded as of no account, howsoever the nations, like clay in the hands of the potter, may have to assume new forms, as certainly they will, yet the foundation of God standeth sure. And for Christian men in revolutionary epochs, whether these revolutions affect the forms in which truth is grasped, or whether they affect the moulds into which society is run, the only worthy temper is the calm, triumphant expectation that through all the dust, contradiction, and distraction, the fair city of God will be brought nearer and made more manifest to man. Isaiah, or whoever was the writer of these great words of my text, stayed his own and his people's hearts in a time of confusion and distress, by the thought that it was only Babylon that could fall, and that Jerusalem was the possessor of a charmed, immortal life.
This strong city, the order of human society which God has appointed, and which exists, though it be hidden in the heavens, will be manifested one day when, like the fair vision of the goddess rising from amidst the ocean's foam, and shedding peace and beauty over the charmed waves, there will emerge from all the wild confusion and tossing billows of the sea of the peoples the fair form of the 'Bride, the Lamb's wife.' There shall be an apocalypse of the city, and whether the old words which catch up the spirit of my text, and speak of that Holy City as 'descending from heaven' upon earth, at the close of the history of the world, are to be taken, as perhaps they are, as expressive of the truth that a renewed earth is to be the dwelling of the ransomed or no, this at least is clear, that the city shall be revealed, and when Babylon is swept away, Zion shall stand.
To this city—existent, immortal, and waiting to be revealed—you and I may belong to-day. 'We have a strong city.' You may lay hold of life either by the side of it which is transient and trivial and contemptible, or by the side of it which goes down through all the mutable and is rooted in eternity. As in some seaweed, far out in the depths of the ocean, the tiny frond that floats upon the billow goes down and down and down, by filaments that bind it to the basal rock, so the most insignificant act of our fleeting days has a hold upon eternity, and life in all its moments may be knit to the permanent. We may unite our lives with the surface of time or with the centre of eternity. Though we dwell in tabernacles, we may still be 'come to Mount Zion,' and all life be awful, noble, solemn, religions, because it is all connected with the unseen city across the seas. It is for us to determine to which of these orders—the perishable, noisy and intrusive and persistent in its appeals, or the calm, silent, most real, eternal order beyond the stars—our petty lives shall attach themselves.
II. Now note, secondly, the defences.
'Salvation will God appoint for walls and bulwarks.' This 'evangelical prophet,' as he has been called, is distinguished, not only by the clearness of his anticipations of Jesus Christ and His work, but by the fulness and depth which he attaches to that word 'salvation.' He all but anticipates the New Testament completeness and fulness of meaning, and lifts it from all merely material associations of earthly or transitory deliverance, into the sphere in which we are accustomed to regard it as especially moving. By 'salvation' he means and we mean, not only negative but positive blessings. Negatively it includes the removal of every conceivable or endurable evil, 'all the ills that flesh is heir to,' whether they be evils of sin or evils of sorrow; and, positively, the investiture with every possible good that humanity is capable of, whether it be good of goodness, or good of happiness. This is what the prophet tells us is the wall and bulwark of his ideal-real city.
Mark the eloquent omission of the name of the builder of the wall. 'God' is a supplement. Salvation 'will He appoint for walls and bulwarks.' No need to say who it is that flings such a fortification around the city. There is only one hand that can trace the lines of such walls; only one hand that can pile their stones; only one that can lay them, as the walls of Jericho were laid, in the blood of His first-born Son. 'Salvation will He appoint for walls and bulwarks.' That is to say in a highly imaginative and picturesque form, that the defense of the City is God Himself; and it is substantially a parallel with other words which speak about Him as being 'a wall of fire round about it and the glory in the midst of it.' The fact of salvation is the wall and the bulwark. And the consciousness of the fact and the sense of possessing it, is for our poor hearts, one of our best defenses against both the evil of sin and the evil of sorrow. For nothing so robs temptation of its power, so lightens the pressure of calamities, and draws the poison from the fangs of sin and sorrow, as the assurance that the loving purpose of God to save grasps and keeps us. They who shelter behind that wall, feel that between them and sin, and them and sorrow, there rises the inexpugnable defense of an Almighty purpose and power to save, lie safe whatever betides. There is no need of other defenses. Zion
'Needs no bulwarks,
No towers along the steep.'
God Himself is the shield and none other is required.