Popery having brought various innovations into the Church, and overspread the Christian world with darkness and superstition, some few, who plainly perceived the pernicious tendency of such errors, determined to show the light of the Gospel in its real purity, and to disperse those clouds which artful priests had raised about it, in order to blind the people, and obscure its real brightness.

The principal among these was Berengarius, who, about the year 1000, boldly preached Gospel truths, according to their primitive purity. Many, from conviction, assented to his doctrine, and were, on that account, called Berengarians. To Berengarius succeeded Peer Bruis, who preached at Toulouse, under the protection of an earl, named Hildephonsus; and the whole tenets of the reformers, with the reasons of their separation from the Church of Rome, were published in a book written by Bruis, under the title of "Antichrist."

By the year of Christ 1140, the number of the reformed was very great, and the probability of its increasing alarmed the pope, who wrote to several princes to banish them from their dominions, and employed many learned men to write against their doctrines.

In A.D. 1147, because of Henry of Toulouse, deemed their most eminent preacher, they were called Henericians; and as they would not admit of any proofs relative to religion, but what could be deduced from the Scriptures themselves, the popish party gave them the name of apostolics. At length, Peter Waldo, or Valdo, a native of Lyons, eminent for his piety and learning, became a strenuous opposer of popery; and from him the reformed, at that time, received the appellation of Waldenses or Waldoys.

Pope Alexander III being informed by the bishop of Lyons of these transactions, excommunicated Waldo and his adherents, and commanded the bishop to exterminate them, if possible, from the face of the earth; hence began the papal persecutions against the Waldenses.

The proceedings of Waldo and the reformed, occasioned the first rise of the inquisitors; for Pope Innocent III authorized certain monks as inquisitors, to inquire for, and deliver over, the reformed to the secular power. The process was short, as an accusation was deemed adequate to guilt, and a candid trial was never granted to the accused.

The pope, finding that these cruel means had not the intended effect, sent several learned monks to preach among the Waldenses, and to endeavor to argue them out of their opinions. Among these monks was one Dominic, who appeared extremely zealous in the cause of popery. This Dominic instituted an order, which, from him, was called the order of Dominican friars; and the members of this order have ever since been the principal inquisitors in the various inquisitions in the world. The power of the inquisitors was unlimited; they proceeded against whom they pleased, without any consideration of age, sex, or rank. Let the accusers be ever so infamous, the accusation was deemed valid; and even anonymous informations, sent by letter, were thought sufficient evidence.

To be rich was a crime equal to heresy; therefore many who had money were accused of heresy, or of being favorers of heretics, that they might be obliged to pay for their opinions. The dearest friends or nearest kindred could not, without danger, serve any one who was imprisoned on account of religion. To convey to those who were confined, a little straw, or give them a cup of water, was called favoring of the heretics, and they were prosecuted accordingly. No lawyer dared to plead for his own brother, and their malice even extended beyond the grave; hence the bones of many were dug up and burnt, as examples to the living. If a man on his deathbed was accused of being a follower of Waldo, his estates were confiscated, and the heir to them defrauded of his inheritance; and some were sent to the Holy Land, while the Dominicans took possession of their houses and properties, and, when the owners returned, would often pretend not to know them. These persecutions were continued for several centuries under different popes and other great dignitaries of the Catholic Church.