After completing his course at the University of Edinburgh, Horatius began mission work in Leith, under Rev. James Lewis. In one of the most squalid parts of the city he conducted services and Sunday school in a hall. The children did not seem to enjoy singing the Psalm paraphrases, which were still exclusively used by the Church of Scotland at that late date, and therefore Bonar decided to write songs of his own. Like Luther, he chose happy tunes familiar to the children, and wrote words to fit them. His first two hymns were "I lay my sins on Jesus" and "The morning, the bright and beautiful morning." Still others were "I was a wandering sheep" and "A few more years shall roll." Needless to say, the children sang and enjoyed them. At this time, also, he wrote his first hymn for adults, "Go, labor on! Spend and be spent!" It was intended to encourage those who were working with him among the poor of his district. After four years Bonar was ordained as a minister of the Church of Scotland, assuming charge of a new church at Kelso. He was a man of prayer, and his first sermon to his people was an exhortation to prayer. It is said that a young servant in his home was converted by his prayers. Hearing his earnest supplications from his locked study, she thought: "If he needs to pray so much, what will become of me, if I do not pray!" Many stories are related of his methods of dealing with seeking souls. A young man who was troubled by a grievous sin came to Bonar for help. The latter told him that God was willing to forgive and that the blood of Jesus His Son cleanseth from all sin. The despairing young man seemed unable to believe the gospel message, however, and continually reminded Bonar of the greatness of his transgression. Finally an inspiration came to the pastor. "Tell me," he demanded, "which is of greater weight in the eyes of God--your sin, black as it is, or the blood of Jesus, shed for sinners?" Light dawned on the soul of the troubled young man, and he cried joyfully, "Oh, I am sure the blood of Jesus weighs more heavily than even my sin!" And so he found peace. Bonar was a man of boundless energy. When he was not preaching, he was writing hymns or tracts or books. One of his tracts, "Believe and Live," was printed in more than a million copies, and the late Queen Victoria of England was much blessed by it. His hymns number about 600, and the fact that at least 100 are in common use today is a testimonial to their worth. Dr. Bonar never used his hymns in his own church worship, but when, on a certain occasion near the close of his life, he broke the rule, two of his elders showed their emphatic disapproval by walking out of church.