SUMMARY OF HOW THE HOLY SPIRIT WORKS AND DWELLS IN US
First, let's deal with the myths. The Spirit does not speak in tongues today, especially in babbling nonsense. Read in Acts 2 about the apostles speaking in all the languages of the foreigners who attended the Pentecost to listen to the apostles. Paul later needed this gift as he traveled to places where he didn't know the local language. But according to 1 Corinthians 13 that tongues as an incomplete gift would cease once the perfect gift would come...the completion of the written New Testament. Now we have many foreign language translations of the Bible, which makes tongues no longer needed.
There were people who had special knowledge through the Spirit. Again, this was before the complete New Testament was written. Those people that had hand hands laid on them had complete knowledge of the entire New Testament so they can teach it. Again, 1 Corinthians says special knowledge will cease when the complete came. Again all that knowledge is in the Bible.
What does the Holy Spirit do today? The Word of God is God-breathed by the Holy Spirit. The Holy Spirit changes people's hearts with the Word. The Spirit works though His powerful Word. The Spirit dwells in us through the Word.
In Ephesians, the Word is described as the Sword of the Spirit. But don't be confused, the Spirit is NOT the same as the Word.
Let me give you example...I chopped down a tree with an axe. Am I the axe...of course not. I worked through an axe to chop down a tree. Same with the Spirit. He works through the Word which touches hearts.
Some will say the Spirit does little today...nonsense! Millions of people have become Christians through the Sword of the Spirit, and many of them change their lives, changed their family's lives, and have changed their corner of the world.
But remember, the Spirit only dwells us when we obey on God's terms, as mentioned by the Bible (Acts 2:38).