Ezekiel 46-48

After God showed Ezekiel the vision of the stream flowing from the temple he gave his prophet one more instruction; "note all this carefully." (41:6) What dId God want Ezekiel to understand? What was the message of the running water? Did Ezekiel see the message God wished to share with future generation? Or even the current meaning of the vision? I don't think I see it.
Stuart