In his salutation to the seven churches of Asia, identified by name in chapters 2 & 3, he pronounces blessings upon them from the Father “Him who is and who was and who is to come”, the Holy Spirit “the seven Spirits who are before His throne”, and the Son “the firstborn from the dead.”
(Note: some believe the phrase “seven Spirits” refers to the spirits of the seven churches, but it seems the context is referring to each person of the Godhead, in turn. As such, the number seven would have symbolic significance as a reference to the Holy Spirit).
Regardless, John affirms Jesus as our Lord and Savior (6), and promises His second coming (7). The central theme of the book is our victory through the power of God. He is the “Alpha and the Omega, the Beginning and the End… who is and was and who is to come, the Almighty” (8).
