v 1 river of water of life
Zech 14:8; Ez 47:1
And remember when Moses struck the Rock - living water came out and sustained the Israelites
v 3- there will be "no more curse" because of this River
v 2- this is a real tree and it's leaves will be for healing the nations (Ez 47: 12) this is recorded for events still in the millennium there will still be a need for healing.

3 descriptions of Christ
v 13 I am "the alpha and omega"
v 16 the root
v 17 water of life
v 7 Keep the words of the prophecy (2 Peter 2:11,14)
The perspective v8 is on Christ - John fell down and started to worship and was reprimanded

3 reminders of the return of Christ
v 7 heed the prophecy
v 12 look for the reward
v 20 a hearty "amen"