20.  Hate all heretics, but especially him who is rightly named after mania Eusebius in his brief notice of the Manichean heresy (Hist. Eccles. vii. 31) plays, like S. Cyril, upon the name Manes as well suited to a madman., who arose not long ago in the reign of Probus Marcus Aurelius Probus, Emperor a.d. 276–282, from being an obscure Illyrian soldier came to be universally esteemed the best and noblest of the Roman Emperors..  For the delusion began full seventy years ago Routh (R.S. V. p. 12) comes to the conclusion that the famous disputation between Manes and Archelaus took place between July and December, a.d. 277.  Accordingly these Lectures, being “full 70 years” later, could not have been delivered before the Spring of a.d. 348., and there are men still living who saw him with their very eyes.  But hate him not for this, that he lived a short time ago; but because of his impious doctrines hate thou the worker of wickedness, the receptacle of all filth, who gathered up the mire of every heresy Leo the Great (Serm. xv. cap. 4) speaks of the madness of the later Manichees as including all errors and impieties:  “all profanity of Paganism, all blindness of the carnal Jews, the illicit secrets of the magic art, the sacrilege and blasphemy of all heresies, flowed together in that sect as into a sort of cess-pool of all filth.”  Leo summoned those whom they called the “elect,” both men and women, before an assembly of Bishops and Presbyters, and obtained from these witnesses a full account of the execrable practices of the sect, in which, as he declares, “their law is lying, their religion the devil, their sacrifice obscenity.”.  For aspiring to become pre-eminent among wicked men, he took the doctrines of all, and having combined them into one heresy filled with blasphemies and all iniquity, he makes havoc of the Church, or rather of those outside the Church, roaming about like a lion and devouring.  Heed not their fair speech, nor their supposed humility:  for they are serpents, a generation of vipers Matt. iii. 7..  Judas too said Hail! Master Ib. xxvi. 49., even while he was betraying Him.  Heed not their kisses, but beware of their venom.