This is not so much a teaching as it is the groanings of a burdened heart to exalt God above man to His rightful place in revival. Campbell shared several practical "principles that govern spiritual quickening." The differences between a God-sent revival and the man-centered evangelistic means of his day are truly heart-searching for anyone engaged in work to save men's souls. Since God's sovereignty does not nullify man's responsibility, Campbell admonished his hearers to be "agents of revival" that take God up on "His covenant engagement" in prayer and staying close to the heart of the Shepherd.