Spread of heresy
The growth of heresy, like the growth of plants, depends on surrounding influences, even more than on its vital force. Philosophies, religious ideals and aspirations, social and economic conditions, are brought into contact with revealed truth, and from the impact result both new affirmations and new negations of the traditional doctrine.
I) The first requisite for success is a forceful man, not necessarily of great intellect and learning, but of strong will and daring action. Such were the men who in all ages have given their names to new sects.
II) The second requisite is accommodation of the new doctrine to the contemporary mentality, to social and political conditions.
III) The last, but by no means the least, is the support of secular rulers.
A strong man in touch with his time, and supported by material force, may deform the existing religion and build up a new heretical sect. Modernism fails to combine into a body separate from the Church because it lacks an acknowledged leader, because it appeals to only a small minority of contemporary minds, namely, to a small number who are dissatisfied with the Church as she now is, and because no secular power lends it support. For the same reason, and proportionately, a thousand small sects have failed, whose names still encumber the pages of church history, but whose tenets interest only a few students, and whose adherents are nowhere. Such were, in the Apostolic Age, the Judeo-Christians, Judeo-Gnostics, Nicolaites, Docetae, Cerinthians, Ebionites, Nazarenes, followed, in the next two centuries, by a variety of Syrian and Alexandrian Gnostics, by Ophites, Marcionites, Encratites, Montanists, Manichæans, and others. All the early Eastern sects fed on the fanciful speculations so dear to the Eastern mind, but, lacking the support of temporal power, they disappeared under the anathemas of the guardians of the depositum fidei.
Reference:
Catholic Encyclopedia
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