Dr. Bob Brado leads a 13-lesson, verse-by-verse teaching series through the Book of Acts, recorded from a live classroom setting with students present. This in-depth study carefully walks through the historical narrative of the early church, key theological themes, and practical applications for Christian life and ministry. This lesson centers on Acts 2 as a pivotal moment in redemptive history, marking the inauguration of the Church at Pentecost through the outpouring of the Holy Spirit, fulfilling Old Testament feasts as prophetic types of Christ's first and second comings. The event, occurring 50 days after the resurrection and coinciding with the Feast of Weeks, symbolizes the transition from the Old Covenant to the New, with the apostles speaking in tongues as a miraculous sign to unite diverse nations in hearing the gospel in their own languages. The preacher emphasizes that the gift of tongues was a temporary, context-specific phenomenon for the apostles, not a universal or ongoing spiritual experience, and that the primary purpose was to authenticate the message of Christ's resurrection and the arrival of the last days, as prophesied by Joel. Peter's sermon, rooted in Jewish theology and Scripture, calls the people to repentance and baptism, not as a requirement for salvation in the present age, but as a national act of repentance and identification with Christ in a transitional era. The chapter concludes with the Church's formation through shared fellowship, devotion to apostolic teaching, and the miraculous growth of 3,000 souls, illustrating the power of the Spirit in establishing the body of Christ.