This is a portrait of the heart and soul of a remarkable man. He had been a great sinner, but God - who in other days had changed the bitterest persecutor of the church into its noblest preacher - changed Flockhart into a great saint. He had sinned much, had been forgiven much, and so he loved much. In Satan's service he had often exposed himself to disgrace, danger and death itself. Converted in India while a soldier, Flockhart was fearless as a street preacher in Edinburgh - often in the face of unruly crowds. He was uniquely gifted as a natural orator with a true genius for picturesque language.