The document discusses the coming of the Holy Spirit at Pentecost and the transformation it brought to the disciples. It describes two types of baptism: water baptism and baptism by the Holy Spirit. The baptism of the Holy Spirit empowers believers and enables them to speak in other tongues, as evidenced on the day of Pentecost and several other biblical events. The document encourages readers to receive the baptism of the Holy Spirit by asking, accepting through faith, and acting through speaking in tongues.