"When Bunyan entered upon ministerial duties, it was with the deepest anxiety; in proclaiming the unsearchable riches of Christ, his first effort was to fix upon his hearers the all-important truth, 'Ye must be born again.' This soon led him into controversy, in which he made marvellous discoveries of the state of society... Strangely absurd errors were promulgated, to conquer which, all the mighty energies of Bunyan's mind... were brought into active exercise. Limited in preaching to the few who were within the sound of his voice, and knowing that poisonous errors had extended throughout the kingdom, he sought the all-powerful aid of the press, and published several searching treatises before his imprisonment. Soon after this, he was called to suffer persecution as a Christian confessor, and then his voice was limited to the walls of his prison, excepting when, by the singular favour of his jailers, he was permitted to make stolen visits to his fellow-Christians. From the den in this jail issued works which have embalmed his memory in the richest fragrance in the churches of Christ, not only in his native land, but in nearly all the kingdoms of the world. Thus was the folly of persecution demonstrated, while the mad wrath of man promoted the very object which it intended to destroy."