The Great Heresies continued
Catharism (11th Century)
Catharism was a complicated mix of non-Christian religions reworked with Christian terminology. The Cathars had many different sects; they had in common a teaching that the world was created by an evil deity (so matter was evil) and we must worship the good deity instead. The Albigensians formed one of the largest Cathar sects. They taught that the spirit was created by God, and was good, while the body was created by an evil god, and the spirit must be freed from the body. Having children was one of the greatest evils, since it entailed imprisoning another "spirit" in flesh. Logically, marriage was forbidden, though fornication was permitted. Tremendous fasts and severe mortifications of all kinds were practiced, and their leaders went about in voluntary poverty.
Protestantism (16th Century)
Protestant groups display a wide variety of different doctrines. However, virtually all claim to believe in the teachings of sola scriptura ("by Scripture alone"—the idea that we must use only the Bible when forming our theology) and sola fide ("by faith alone"— the idea that we are justified by faith only). The great diversity of Protestant doctrines stems from the doctrine of private judgment, which denies the infallible authority of the Church and claims that each individual is to interpret Scripture for himself. This idea is rejected in 2 Peter 1:20, where we are told the first rule of Bible interpretation: "First of all you must understand this, that no prophecy of Scripture is a matter of one’s own interpretation." A significant feature of this heresy is the attempt to pit the Church "against" the Bible, denying that the magisterium has any infallible authority to teach and interpret Scripture. The doctrine of private judgment has resulted in an enormous number of different denominations. There are approximately 20-30,000 denominations, with 270 new ones being formed each year. Virtually all of these are Protestant.
Jansenism (17th Century)
Jansenius, bishop of Ypres, France, initiated this heresy with a paper he wrote on Augustine, which redefined the doctrine of grace. Among other doctrines, his followers denied that Christ died for all men, but claimed that he died only for those who will be finally saved (the elect). This and other Jansenist errors were officially condemned by Pope Innocent X in 1653.
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We have seen how heresy originates and how it spreads; we must now answer the question why it persists, or why so many persevere in heresy.
Once heresy is in possession, it tightens its grip by the thousand subtle and often unconscious influences which mould a man's life.
A child is born in heretical surroundings: before it is able to think for itself its mind has been filled and fashioned by home, school, and church teachings, the authority of which it never doubted.
When, at a riper age, doubts arise, the truth of Catholicism is seldom apprehended as it is. Innate prejudices, educational bias, historical distortions stand in the way and frequently make approach impossible.
The state of conscience technically termed bona fides, good faith, is thus produced. It implies inculpable belief in error, a mistake morally unavoidable and therefore always excusable, sometimes even laudable. In the absence of good faith worldly interests often bar the way from heresy to truth.
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