At the end of the incident the apostles cry: "Truly you are the Son of God", suggesting that the miracle was designed to teach that Christ's followers need to rely on their faith in Christ, first and foremost.
At the end of the incident, the response of the apostles was to cry: "Truly you are the Son of God". Pentecost thus suggests that the miracle was designed to teach the apostles that when encountering obstacles, they need to rely on their faith in Christ, first and foremost.