I wonder if the guest speaker causes a revival to break out because of his messages? "O Israel, return unto the Lord they God; for thou hast fallen by thine iniquity." Hosea 14:1 (Way to many churches today) "Therefore also now, saith the Lord, turn ye even to me with all our hearts, and with fasting, and with weeping, and with mourning:" Joel 2:12 (Have we turned to our "stuff"? Our possessions?) It would appear to me the people turning back to the Lord is what sparks a true revival.