'But there the glorious Lord will be unto us a place of broad rivers and streams; wherein shall go no galley with oars, neither shall gallant ship pass thereby.'--ISAIAH xxxiii. 21. One great peculiarity of Jerusalem, which distinguishes it from almost all other historical cities, is that it has no river. Babylon was on the Euphrates, Nineveh on the Tigris, Thebes on the Nile, Rome on the Tiber; but Jerusalem had nothing but a fountain or two, and a well or two, and a little trickle and an intermittent stream. The water supply to-day is, and always has been, a great difficulty, and an insuperable barrier to the city's ever having a great population. That deficiency throws a great deal of beautiful light on more than one passage in the Old Testament. For instance, this same prophet contrasts the living stream, the waters of Siloam, as an emblem of the gentle sway of the divine King of Israel, with 'the river, strong and mighty,' which was the symbol of Assyria; and a psalm that we all know well, sings, 'There is a river, the streams whereof make glad the city of God,'--a triumphant exclamation which is robbed of half its force, unless we remember that the literal Jerusalem had no river at all. The vision of living waters flowing from the Temple which Ezekiel saw is a variation of the same theme, and suggests that in the Messianic days the deficiency shall be made good, and a mysterious stream shall spring up from behind, and flow out from beneath, the temple doors, and then with rapid increase and depth and width, but with no tributaries coming into it, shall run fertilising and life-giving everywhere, till it pours itself into the noisome waters of the sullen sea of death and heals even them. The same general representation is contained in the words before us. Isaiah's great vision is not, as I take it, of a future, but of what the Jerusalem of his day might be to the Israelite if he would live by faith. The mighty Lord, 'the glorious Lord,' shall Himself 'be a place of broad rivers and streams.' I. First, then, this remarkable promise suggests to me how in God there is the supply of all deficiencies. The city was perched on its barren, hot rock, with scarcely a drop of water, and its inhabitants must often have been tempted to wish that there had been running down the sun-bleached bed of the Kedron a flashing stream, such as laved the rock-cut temples and tombs of Thebes. Isaiah says, in effect, 'You cannot see it, but if you will trust yourselves to God, there will be such a river.'