Dr. Luke reveals, from eyewitness testimony, that the new converts to Christ were feeling great pressure to conform to the popularized expectations of both their civil and religious leaders. Those 1st century, non-christian expectations would have had them self-silence, closing their own mouths and abandoning the evangelism of others. Luke reveals that the promised power of God came, strengthening them to speak-up, unashamedly. The Spirit guided them to pray and to study and proclaim the Word.