The book of Revelation is the culmination of God’s biblical canon for his church and as such it should be no surprise that the Father, Son, and Holy Spirit as one Godhead have an active role in it. From verse 1 of chapter 1, we learn this awesome Revelation not only belongs to Jesus Christ, but was given to him from God the Father. In verse 4 of that same chapter, we also see this Revelation is from the Holy Spirit who manifests himself as seven Spirits before God’s throne.
As chapter 1 continues to unfold, we see confirmation the church belongs to Jesus Christ since he “washed us from our sins in his own blood” and holds the seven stars while standing in the midst of the seven golden candlesticks which symbolize his churches. We also have confirmation that God the Father also owns us since we are made kings and priests unto him. The Lord Jesus and God the Father also share many of the same names and titles throughout the book. For instance, Jesus is called “the Almighty” just like God the Father (compare 1:8 and 4:8). Christ also refers to himself as Alpha and Omega, the beginning and the ending, exactly like God the Father does (see 1:8 and 21:4-6).
What’s really interesting to notice is how the seven churches are prophetically addressed. At the beginning of each of the seven letters to the seven churches, the Lord Jesus identifies himself in a different way to each church. He makes it clear that he is the one speaking to each congregation. But also notice that at the conclusion of each letter, each congregation is told to hear “what the Spirit saith unto the churches.” This is an undeniable indication that the Lord Jesus and the Holy Spirit are equals, speaking to the churches with one voice. Additionally, if we refer back to Revelation 1:1 and take into account the overarching principle that God the Father gave this Revelation to Jesus, we can conclude that all three persons of the Godhead are speaking to the churches with one voice.
The manner in which John distributed this Revelation to the churches shows that there was the widespread automatic assumption in these churches that the Godhead is a Trinity. The Trinity was never debated and didn’t have to be explained. It was demonstrated to the churches that God the Father, and/or the Son, and/or the Holy Spirit could at any given time speak to them to tell them what they needed to hear. The same principle applies to his church today. God is in the midst of his congregations even when two or three are gathered in his name. Since that’s the case, it should be our expectation to hear something from the Trinity, who is one God.