The first chapter of the book of Acts is a call to the followers of Jesus to prepare for receiving the power of the Holy Spirit, which is to come upon those who will prepare for their baptism with the Holy Spirit. He wants them to know that it will be a time of waiting in prevailing prayer. Realizing their human weaknesses, Jesus instructs them that they are not to begin spreading His Gospel message until they are empowered to do so.
Jesus had been the perfect model for preparing His followers to spread His Gospel to the ends of the earth. John the Baptist introduced Jesus to the gathered crowds along the Jordan River, and at Jesus’ request, he baptized Him so that He could identify with sinners who were repenting and being baptized. Jesus Himself was filled with the Holy Spirit, even as He arose from the water. The Sinless Son of God, who had incarnately become the Son of Man, realized that He in His human role would need the power of the Holy Spirit to accomplish His mission. John the Baptist had told the crowds: “I indeed baptize you with water unto repentance, but He who is coming after me is mightier than I, whose sandals I am not worthy to carry. He will baptize you with the Holy Spirit and fire.” (Matthew 3:11)
Several symbols are used for the Holy Spirit throughout the Bible to help us understand what He wants to do in and for and through us as His witnesses. But no symbol is more striking than that of fire! Jesus said, “I came to send fire on the earth, and how I wish it were already kindled!” (Luke 12:49) Following His resurrection, He commanded His disciples and other followers to go back into Jerusalem and prepare for receiving the Holy Spirit. “When the Day of Pentecost had fully come, they were all with one accord in one place. And suddenly there came a sound from heaven, as of a rushing mighty wind, and it filled the whole house where they were sitting. Then there appeared to them divided tongues, as of fire, and one sat upon each of them. And they were all filled with the Holy Spirit and began to speak with other tongues, as the Spirit gave them utterance. And there were dwelling in Jerusalem Jews, devout men, from every nation under heaven. And when this sound occurred, the multitude came together, and were confused, because everyone heard them speak in his own language.” (Acts 2:1-6)