The day of Pentecost comes and as all the believers are there, the Holy Spirit comes and fills them, giving them spiritual utterances. The Holy Spirit permanently indwells people that place their faith in Christ at the moment of conversion, not like some that believe the Holy Spirit is correlated with speaking with tongues. The day of Pentecost was a description of an extraordinary event orchestrated by God, not a prescription of what Christian conversion looks like. The Holy Spirit allows for unprecedented intimacy with God through the mystical union that binds us together with Him and is a key in learning how to mature in our faith. After the miracle at Pentecost, Peter teaches to the crowds about the need for forgiveness through Jesus Christ and 3,000 people came to faith.