Behold...
waters issued out from under the threshold of the house

The Temple on earth was a copy of the Temple in heaven. (That's why the specifications had to be so precise.) Just as there is a Temple in heaven, there is a river in heaven, which will one day flow here in the physical realm. Now, however, it does flow there and touches us spiritually here. We can be in that flow--the flow of the Spirit, just like Ezekiel saw himself walking into the waters of the river in his vision. This flow brings life and healing and fruit. Everything shall live whither the river cometh.

Afterward he brought me again unto the door of the house; and, behold, waters issued out from under the threshold of the house eastward: for the forefront of the house stood toward the east, and the waters came down from under from the right side of the house, at the south side of the altar. Now when I had returned, behold, at the bank of the river were very many trees on the one side and on the other. Then said he unto me, These waters issue out toward the east country, and go down into the desert, and go into the sea: which being brought forth into the sea, the waters shall be healed. And it shall come to pass, that every thing that liveth, which moveth, whithersoever the rivers shall come, shall live: and there shall be a very great multitude of fish, because these waters shall come thither: for they shall be healed; and every thing shall live whither the river cometh. And by the river upon the bank thereof, on this side and on that side, shall grow all trees for meat, whose leaf shall not fade, neither shall the fruit thereof be consumed: it shall bring forth new fruit according to his months, because their waters they issued out of the sanctuary: and the fruit thereof shall be for meat, and the leaf thereof for medicine.--Ezekiel 47:1, 8-9, 12