The most striking aspect of the epistolary salutations in the New Testament letters is the complete absence of greetings from the Holy Spirit. In nearly every greeting, the writers send grace, mercy, and peace from God the Father and the Lord Jesus Christ, yet there is no mention of a personal greeting from the Holy Spirit across twenty epistles from five apostles. This consistent omission suggests that the Holy Spirit does not send greetings because it is not a distinct entity separate from the Father and the Son. Instead, the Holy Spirit is understood as the divine essence of both the Father and the Son, residing in God's chosen ones. Jesus Himself clarifies this in John 14, teaching that the Holy Spirit is not another personality but the shared essence of the Father and the Son. Paul reinforces this in II Corinthians 3:17, stating plainly, "Now the Lord is the Spirit," identifying the Spirit with Christ. Additionally, in Romans 8:26 and 34, the Spirit's intercession for us is equated with Christ's intercession, showing Their unity. The "Christ in you" statements, found in passages like Romans 8:10 and Galatians 2:20, further indicate that the Spirit of the Son abides with us. Broadly, the Holy Spirit represents the personality, mind, and power of God to accomplish His will throughout creation. For believers, it is the means by which the Father and the Son live in us, interact with us, empower us, and enable our relationship with Them. As Jesus prays in John 17:20-23, the unity between the Father and the Son extends to us through the Spirit, making us one with Them. When Christ is in us, the Father is in us also, uniting us with Both in spirit and guiding us to grow in character to reflect Their oneness.

The concept of the Holy Spirit as presented challenges the notion of a triune Godhead with three co-equal beings. Instead, it is asserted that the Holy Spirit is not a separate third person but is intrinsically linked to the Father and the Son. Jesus Christ Himself is identified as the Holy Spirit, emphasizing that it is Christ in us, the hope of glory, rather than a distinct entity. This understanding stems from Jesus' own words, where He declares that He will come to us, not a third person, through the Spirit that emanates from His mind, acting as a powerful communication from God to man. Jesus describes the Holy Spirit as the Spirit of truth, which He embodies, stating that He is the way, the truth, and the life. This Spirit, previously manifested in His physical presence as the Comforter for 3½ years, would continue as an invisible, spiritual force after His departure. He assures His disciples that He will not leave them comfortless but will come to them, manifesting Himself through this Spirit, reinforcing that it is He who dwells with and in them. Furthermore, both the Father and the Son are described as Spirit and holy, thus both are Holy Spirit. This unity and oneness between Them signify that the indwelling Spirit in believers is Jesus Christ, not a separate being. There is no indication of a third person in the Godhead having a relationship akin to that between the Father and the Son, nor is there evidence of the Holy Spirit being worshipped as a distinct entity, unlike the Father and the Son. Jesus' teachings highlight that the Spirit is an invisible power communicated from Him to us, empowering believers to understand, remember, overcome, witness, and glorify God, just as He did. This Spirit, being Christ in us, is the driving force preparing us for God's Kingdom, negating the existence of a trinitarian Godhead with a separate third person.