She owed much to her association with the Church, but more to her Bible. Once a girl asked her for something to read, and she handed her the Book saying, "Take that; it has made me a changed lassie." The study of it was less a duty than a joy; it was like reading a message addressed specially to herself, containing news of surpassing personal interest and import. God was very real to her. To think that behind all the strain and struggle and show of the world there was a Personality, not a thought or a dream, not something she could not tell what, in spaces she knew not where, but One who was actual and close to her, overflowing with love and compassion, and ready to listen to her, and to heal and guide and strengthen her--it was marvellous. She wished to know all He had to tell her, in order that she might rule her conduct according to His will. Most of all it was the story of Christ that she pored over and thought about. His Divine majesty, the beauty and grace of His life, the pathos of His death on the Cross, affected her inexpressibly. But it was His love, so strong, so tender, so pitiful, that won her heart and devotion and filled her with a happiness and peace that suffused her inner life like sunshine. In return she loved Him with a love so intense that it was often a pain. She felt that she could not do enough for one who had done so much for her. As the years passed she surrendered herself more and more to His influence, and was ready for any duty she was called upon to do for Him, no matter how humble or exacting it might be. It was this passion of love and gratitude, this abandonment of self, this longing for service, that carried her into her life-work. Wishart Church stood in the midst of slums. Pends, or arched passages, led from the Cowgate into tall tenements with outside spiral stairs which opened upon a maze of landings and homes. Out of these sunless rookeries tides of young life poured by night and day, and spread over the neighbouring streets in undisciplined freedom. Mary's heart often ached for these boys and girls, whom she loved in spite of all their roughness; and when a mission was determined on, and a room was taken at 6 Queen Street--a small side thoroughfare nearly opposite Quarry Pend, one of the worst of the alleys--she volunteered as a teacher. And so began a second period of stem training which was to serve her well in the years to come. The wilder spirits made sport of the meetings and endeavoured to wreck them. "That little room," she wrote, "was full of romantic experiences." There was danger outside when the staff separated, and she recalled how several of the older men surrounded the "smaller individuals" when they faced the storm. One of these was Mr. J. H. Smith, who became her warm friend and counsellor.