“Revive us again, fill each heart with thy love. May each soul be rekindled with fire from above. Hallelujah! Thine be the glory. Revive us again.” This hymn, “Revive Us Again,” was written by William P. Mackay in 1863. Although he was raised by a Christian mother, when he entered the University of Edinburgh to study medicine, he began a downward slope into heavy drinking and immorality. He even pawned the Bible his mother gave him for spiritual guidance.       Years later, when he ...