What actually happened and what does it mean to you?
Without an understanding of what happened at your new birth, you cannot achieve true Christian maturity. If you are not growing you are deteriorating.
In the Old Testament, with few exceptions, the Holy Spirit "came upon", never "came in". The indwelling of the Holy Spirit is a New Testament phenomenon, first occurring, prior to the Day of Pentecost, with Mary, Jesus’ mother; Zechariah and Elizabeth, John the Baptist’s parents; John, himself; and, finally, Jesus of Nazareth.(Jn 14:17,18)
Letting Jesus live His life anew through you.