John Wesley had been profoundly impressed by William Law's pious and mystical book, "A Serious Call to a Devout and Holy Life," which was published in 1729. Law lived in London, and Wesley, who desired to be in frequent intercourse with him, used to walk to and from the metropolis for the purpose. The money he thus saved he gave to the poor. He wore his hair at one time very long in order to save the expense of cutting and dressing it, and thus have more money to give away in charity. He and his little band of associates, whose numbers swelled at one time up to twenty-five, but afterwards dropped down to five, imposed on themselves rules of discipline almost as harsh as those of a monastery of the Trappist order. They fasted every Wednesday and Friday, and they made it a duty to visit the prisons and hospitals. Wesley's father, who was growing old, was very anxious that his son should succeed him in the rectory of Epworth. John would not hear of it. In vain his father pressed and prayed; the son could not see his way in that direction. John Wesley has been blamed by some of his biographers for not accepting the task which his father desired and thought right to impose on him. But no one on earth could understand John Wesley's mission but John Wesley himself. When it was pressed upon him that in the living of Epworth he would have the charge of two thousand souls he said, "I see not how any man can take care of a hundred." It was pointed out to him that his little band of companions had been growing smaller and smaller; he only answered that he was purifying a fountain and not a stream. The illustration was effective and happy.