Oscar,
The Holy Spirit dwells within every born again believer. Notice that the One God who is the Father of all, and who is above all, and through all, is in all believers. God is in every believer. How? Through the indwelling of the Holy Spirit, God. I have experienced many, many times that individuals who are not believers do not believe that Jesus is God, however, when they are born again, they experience the truth of the triune God through their studying of the Bible.
4 There is one body, and one Spirit, even as ye are called in one hope of your calling; 5 One Lord, one faith, one baptism, 6 One God and Father of all, who is above all, and through all, and in you all. Ephesians 4:4-6
Romans 8:9 speaks clearly that Jesus and the Spirit are God; and whoever does not have the Spirit of God, which is the Spirit of Christ, which is God "in you all", according to Romans 8:9, is none of HIS.
9 But ye are not in the flesh, but in the Spirit, if so be that the Spirit of God dwell in you. Now if any man have not the Spirit of Christ, he is none of his. Romans 8:9
One can read and read and read the Scriptures until the breath of life is taken from them, but until they become born again, there can be no understanding without the Spirit dwelling within them.
Welcome back.
Michael