Prayer opens our lives to God’s cleansing power. During prayer, the Holy Spirit X-rays our souls. We see  hidden sins and defects in our characters that keep us from being the powerful witnesses He  longs for us to be. Prayer draws us into an intimate relationship with Jesus. In prayer, we open our minds to the guidance of the Holy Spirit. We seek His wisdom, not our own. Revive Us Again p. 13

From Revive Us Again by Mark A. Finley. Chapter Prayer and Revival