‘When the man went forth eastward with the line in his hand, he measured a thousand cubits, and he caused me to pass through the waters, waters that were to the ankles. Again he measured a thousand, and caused me to pass through the waters, waters that were to the knees. Again he measured a thousand and caused me to pass through the waters, waters that were to the loins. Afterward he measured a thousand, and it was a river that I could not pass through, for the waters were risen, waters to swim in, a river that could not be forded (‘be passed through'). And he said to me, “Son of man, have you seen?” '
The flow of water now grew in volume, gradually growing deeper and deeper, until at length it was too deep for a man to stand up in. That this multiplying of the water was intended to be miraculous cannot be doubted, and evoked the man's question. This was no natural river. There were no streams flowing into the flow, so that its growth was unnatural and could only be by the mighty working of God. Notice its growth in stages, a fact deliberately drawn out by the measuring every thousand cubits. It was a symbol of the mighty working of the Spirit of God beginning in a gradual work that grew and grew until it achieved its fulfilment in waters that bore a man so that he could not resist it.
We note in passing that although Ezekiel was made to paddle in the river and walk through the river there is no suggestion that he was made to swim in it. No doubt he could not swim.
No Israelite would have doubted that this was the River of God that was full of water (Psalms 65:9), as had been that in Eden, sufficient to supply four great rivers (Genesis 2:10). Isaiah 33:21 spoke of God's blessing as being like a place where Yahweh would be with His people in majesty, in a place of broad rivers and streams, but without rowing galley or gallant ship, in other words a heavenly river unaffected by man.
And we have been privileged to see the far end of the streamlet as it has flowed and expanded through the centuries, from the small beginnings of the work of Zerubbabel and Joshua the high priest it grew through the centuries through many godly men until it became the work of John the Baptiser (Malachi 4:6), the ministry of Jesus (John 3:5-6; John 4:10; John 4:14), and the Gospel flowing out through His disciples, through the ages, to the world (John 7:37-39). All coming from the flow from the heavenly temple as it grew and grew. And one day we shall see its glorious final result in the river of water of life in the new earth, in Paradise (Revelation 22:1-5, which is largely based on this chapter).