The waters Ezekiel saw issued out from under the threshold, from the right side of the house, the south side of the altar. Of the heavenly Jerusalem a similar scene is recorded by John in the Revelation. "And he showed me a pure river of water of life, clear as crystal, proceeding out of the throne of God and of the Lamb" (Rev. xxii:1). The stream has its origin in the midst of the millennial temple. There is no use in speculating about the source of the water supply. It is super-natural. He who said, "Let there be a firmament in the midst of the waters, and let it divide the waters from the waters" (Gen. i:6) and He who broke open all the fountains of the deep when His judgment came on the earth (Gen. vii:11) by whose power also the smitten rock in the wilderness supplied the water for His people, He will provide from His inexhaustible resources the life giving stream. And the waters which gush forth are increasing in volume; the stream does not become shallower but deepens in its flow. It is not like a natural river which has its source in a spring and is fed by brooks and rivers. It is a miraculous, unexplainable self-supply which occasions this increase. A thousand cubits are measured and the waters come to the ankles of the prophet. The next thousand cubits bring the waters to the knees; then advancing another thousand cubits the waters come to the loins, and with the fourth thousand they become so deep that the prophet could not fathom them. The four thousand cubits make about a mile and a half, so that the prophet had advanced, under the guidance of the man, this distance from Jerusalem in a southeastern direction. He is caused to return to the bank of the river, and saw there on both sides many trees. These trees testify of the great fertility which this stream will produce in nature. Expositors who give the vision a purely spiritual meaning explain the trees as being the righteous who shall flourish at the waterbrooks (Psalm i).