In this episode, Herod can't stop the Holy Spirit. God will use us no matter what we are facing, despite the trials we go through He will persevere through us. The message must keep going to reach all mankind.
We need to continue in the faith and build up one another. Peter is arrested again and is persecuted for Christ. Despite such efforts, the Gospel cannot be chained.
Christ wants us to fellowship with one another and gives Peter a vision to break the walls of cultural isolation. As believers we are all equal in Christ.