The people of the court and town in the England of Charles II. were a very dissipated and unprincipled set. Most of the fashionable people were proud of their lack of morals, and the plays, the writings, and even the speech of the ruling class were coarse and vulgar beyond belief. William Penn saw all this, and his nature, being on a higher plane and more serious than that of his father's friends, turned instinctively to those who were living clean and respectable lives. In the jumble of new ideas and new religions he found comfort in the simplest and quietest sect; and now, having publicly declared himself a Quaker, he asked permission to be one of their preachers. The Quakers were glad to have a man of William Penn's education and position join their ranks, and when he was twenty-four, he was accepted as one of their regular preachers. Several other men of his own type joined the new sect at about the same time, and these men, having better judgment than the earliest leaders, began to do away with the rather extreme preachings of Fox, and taught a simple and easily understood Christianity. Penn himself kept his cavalier dress, and even continued for a time to wear his sword, which was a sign of a person of fashion. He asked the advice of George Fox about keeping his sword, and the latter, in spite of his extreme views, said, "I advise thee to wear it as long as thou canst." The new recruit made himself very useful to the religious party he had joined. Besides preaching, he wrote a number of tracts, the first of which he called "Truth Exalted." In this he attacked, according to the custom of the times, all religious views that differed from his own, and answered the criticisms of other sects. He was even more useful in interceding for Quakers who had been put in prison. Having friends at court, and being still regarded as something of a courtier, he could appeal to the officers of state better than others of the new sect. His arguments in favor of setting the Quaker prisoners at liberty were listened to respectfully by the high officials, but his requests at that time were not granted. The young preacher and tract writer soon had his hands full with heated arguments and stormy disputes. He wrote a pamphlet called "The Guide Mistaken," and at about the same time two men who belonged to the congregation of the Presbyterian preacher Thomas Vincent in London became Quakers. Thomas Vincent was very angry and called Penn unpleasant names. Thereupon Penn and his friend George Whitehead challenged Vincent to an open debate in the latter's church. The challenge was accepted.