Origen

“ In reply to which, we say that heresies of different kinds have never originated from any matter in which the principle involved was not important and beneficial to human life. For since the science of medicine is useful and necessary to the human race, and many are the points of dispute in it respecting the manner of curing bodies, there are found, for this reason, numerous heresies confessedly prevailing in the science of medicine among the Greeks, and also, I suppose, among those barbarous nations who profess to employ medicine. ”

“ And, again, since philosophy makes a profession of the truth, and promises a knowledge of existing things with a view to the regulation of life, and endeavours to teach what is advantageous to our race, and since the investigation of these matters is attended with great differences of opinion, [1] innumerable heresies have consequently sprung up in philosophy, some of which are more celebrated than others. Even Judaism itself afforded a pretext for the origination of heresies, in the different acceptation accorded to the writings of Moses and those of the prophets. ”