Andrew Murray emphasizes the necessity for believers to allow God to address the sins within their hearts in order to awaken the church and lead to a more devoted life in service to Jesus. He asserts that true transformation and the flow of living water from believers can only occur when they permit God to cleanse their inner sanctuaries. This personal encounter with God's holiness is essential for the advancement of Christ's kingdom and the salvation of souls. Murray calls for a cleansing of the defiled temple of the heart, promising that through this process, God will reveal His glory to the nations.