Our goal is to reflect the same belief system the apostles exhibited. Their historical behavior for church planting and preaching is reflected in the historical book of Acts, which shows Jesus' resurrection and the beginning of the Church in Acts 2 with the outpouring of the Holy Spirit in Jerusalem.
The church was born on the day of Pentecost in Jerusalem, as recorded in Acts chapter 2. Acts 2:38 - Peter preached to the crowd gathered by the interest in the Spirit being poured out in Acts 2:1-4. His sermon moved their hearts after the demonstration of men and women receiving the Holy Spirit because they heard them speaking in tongues. When they asked, "What shall we do?" Peter preached they should "Repent, and be baptized, every one of you, in the name of Jesus Christ, for the remission of sins, and ye shall receive the gift of the Holy Spirit." and that "The promise is unto you, and to your children, and to all that are afar off, as many as the Lord our God shall call." in verse 39. This baptismal formula of being baptized in Jesus' name was used in Acts 8, 10, and 19. Paul also referenced being baptized in Jesus' name to the Corinthian church. Acts 4:12.
Believers were baptized in Jesus' name in Acts 8, 10, & 19. Paul told the Corinthian church that he baptized only a few of them, but it was him doing the baptism, but the name of Jesus was the name they were baptized in.
"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." - Rom. 8:9
On the day the church was born, they received the Holy Ghost, as evidenced by speaking in tongues. This was repeated in Acts 8, 10 and 19. Paul taught that receiving the spirit granted believers the gifts of the spirit in 1 Corinthians 12 & 14. The gift of tongues and interpretation were used to benefit the body of believers around the speaker. Still, he also included that he prayed in tongues in private, which allowed the spirit to speak through him, benefitted his spirit, and let the spirit speak truth into his world.
So, a new believer, as the ones in Acts were, would be filled by the spirit, evidenced by speaking in tongues. as evidence of the Spirit's infilling. A spirit-filled believer would continue to pray in tongues as the Spirit gives the utterance, allowing God to move in their life and impact their area. A gifted believer could speak in a community of believers in spirit-inspired tongues interpreted through the Spirit to benefit and lift the body of Christ gathered to hear what the Spirit says to the church.
This is one way God intended for his Spirit to speak to a gathered body of believers. The other is through the 5-fold ministry, which Paul described as "And he gave some, apostles; and some, prophets; and some, evangelists; and some, pastors and teachers;12 For the perfecting of the saints, for the work of the ministry, for the edifying of the body of Christ: 13 Till we all come in the unity of the faith, and of the knowledge of the Son of God, unto a perfect man, unto the measure of the stature of the fulness of Christ:" Eph 4:11-13
We believe this is for new believers and the church as individuals and as the body of Christ. That was how God did it in the first-century church because of the abundance of scriptural evidence. It was available to the church through the ages, as evidenced by historical records, and we allow God to move this way in and through us today.