The fact that Christ sat on the throne according to
Psalm 110:1 when He ascended into glory, to be High Priest,
Acts 2:33, caused the Holy Ghost baptism to occur.
Ephesians 1 says there is a power that is towards us according to the same degree of power God used in raising Christ and sitting Him at his own right hand. This is none other than the power of the Holy Ghost baptism!
It is the river of life flowing from the throne of GOD AND THE LAMB... Christ on the throne... that we can drink if thirsty. Jesus used this same idea in
John 7:37-39 in saying the rivers of living water were the Holy Ghost baptism.