1 Corinthians 6:2
Or, do you not know that God's people will judge the world? [Note: Possibly this refers to Christians somehow assisting Christ on the judgment day]. And if the world is [to be] judged by you [at that time], are you not capable of judging small matters [now]?
Revelation 1:6
And He made us to be a kingdom [See 5:10] and priests [See I Pet. 2:5, 9] for [serving] His God and Father. May it be so.
Revelation 3:21
The person who has victory [in the Christian life], I will grant him [the privilege of] sitting down with me on my throne, as I also had victory and sat down with my Father on His throne.
Revelation 5:10
and you made them into a kingdom and a priesthood for [serving] our God, and they will rule on the earth."