In this sermon, the speaker focuses on the importance of prayer and the early church's prayer meetings. The sermon begins with the mention of the Lord's Prayer, specifically the line "Give us this day our daily bread and forgive us our debt as we forgive our debtors." The speaker then reads from Acts chapter 4, which describes a prayer meeting of the early church after Peter and John were released from being arrested. The believers lift up their voices to God with one accord, acknowledging His power as the creator of heaven and earth. The sermon emphasizes the need for believers to be concerned about revealing the holiness of God in their daily lives and to be actively engaged in prayer and intercession.