John 14:15 17 – In this passage the Lord Jesus Christ calls the Holy Spirit “another comforter”. Here John uses the Greek word “allos” meaning another of the SAME kind, in contrast to “heteros”, which means another of a different kind. The Lord is saying that the Spirit will be the same presence as He has been.
Jesus also said I will not leave you alone. Then Paul explain further when he says “Christ in you the hope of glory” (Col. 1:27). It is the Holy Spirit in us that actually change us, and reborn us; born us from above. The Holy Spirit in us make us children of God (Rom. 8:15-16, Gal. 4:6). He seals us forever as God’s (Eph. 4:30). It is His presence in us that enable us to believe in Christ (Gal. 3:14), understand the Word (John 14:26), bear fruit (Gal 5:222-23), obey the law (1 John 5:3, Eph. 2:10), resist temptation (Gal. 5:16), destroy the power of the sinful nature (Rom. 6:4-6) and give gifts to edify the Church (1 Cor. 12:7).
When we say Jesus lives in me, we mean the Holy Spirit lives in me. The Holy Spirit is a person and God and not just an extension of God or a manifestation of God.
I believe the event with Ananias and Sapphira (Acts 5:1-11), was a revelation of who the Holy Spirit is. God demonstrated with that event to the church that the Holy Spirit is God and any sin against Him is punishable with death like when you sin against God. With that event God proof to the Church that the Holy Spirit that they just received as a new reality is also God. By that God confirmed the trinity. Now the church know that the Holy Spirit is not a force or an entity, but actually a person and God himself. After that event the fear of God for the Holy Spirit was in them.