God appointed the Apostles as ministers of the new covenant, not of the letter but of the Spirit; for the letter kills, but the Spirit gives life.
(2 Corinthians 3:6)
Therefore, those that believe in this letter "JESUS" as their saviour, are still in their sin. But if you believe in the Spirit "JESUS" as your saviour, you have everlasting life.
For the riches of the glory of this mystery or (this Spirit) among the Gentiles: is Christ in you, the hope of glory.
Colossians 1:27
As it is written, “The first man Adam became a living being.” The last Adam Christ became a life-giving spirit.
1 Corinthians 15:45
Therefore, Our Lord Jesus Christ is the Holy Spirit in us, the giver of everlasting life.
Our Lord Jesus Christ is the Person of the Holy Spirit in all the saints, because through Him we have access by one Spirit unto the Father
(Ephesians 2:18).
For God did not send another person of the God head as you supposed, but God, having raised up his Son Jesus, sent him to bless you, in turning away every one of you from his iniquities.
(ACTS 3:26).
And because you are sons, God has sent forth the Spirit of His only begotten Son into your hearts, crying out, “Abba, Father!”
(Galatians 4:6).
The Holy Spirit is crying out, “Abba, Father!” Because He is the Son of God and He is Our Lord Jesus Christ.
And this is Him who cried in prayer to God saying, “Abba, Father!, all things are possible for You. Take this cup away from Me; nevertheless, not what I will, but what You will.”
(Mark 14:36)
If the Holy Ghost is another person as you supposed, then he cannot cry out “Abba, Father!

God-Holy spirit-Jesus are still ONE. More wisdom to believe in trinity of OUR God