Charles H. Spurgeon on Psalms 46:4

There is a river, etc. This is that flood which Ezekiel beheld in vision, the waters that came down from the right side of the house, and rising first to the ankles —then as the prophet passed onward, to the knees —then to the loins —became afterwards a river that he could not pass over; for the waters were risen, waters to swim in, a river that could not be passed over. Shall we see in this, with the angelic doctor, the river of grace which burst forth from Mount Calvary? streams branching off hither and thither, the pelagim of the Hebrew —"to satisfy the desolate and waste ground, and to cause the bud of the tender herb to spring forth." Job 38:1-41. O "fountain of gardens, ""well of living waters, " "streams from Lebanon, "how do you, the "nether springs" of this world, bring to us something of the everlasting loveliness and peace of those "upper springs, "by which the beautiful flock now feed and lie down, none making them afraid! Or with S. Ambrose and S. Bernard, understand the verse of the "river of water of life, clear as crystal, proceeding from the throne of God and of the Lamb." And then the rivers of that flood shall indeed make glad the city of God, the house not made with hands, eternal in the heavens, where is the tree of life, that beareth twelve manner of fruits, and yieldeth her fruit every month; that country and that river of which the old liturgies say, "They who rest in the bosom of Abraham are in the tabernacle of joy and rest, in the dwellings of light, in the world of pleasure, in the church of the true Jerusalem, where there is no place for affliction, nor way of sadness, where there are no wars with the flesh, and no resistance to temptation, where sin is forgotten, and past danger is only remembered as a present pleasure." Thomas Aquinas, Ambrose, and Bernard, in Neale's Commentary.