The witnessing to the truth before heathen philosophers and the teaching the children of the faith might have fully employed both the zeal and the eloquence of Clement. But there was another and a sadder use for words, in the task of resisting the heresies that seemed to grow like foul excrescences from the very growth of the Church herself. Alexandria, the city of Neo-Platonism, was also with nearly as good a title the city of Gnosticism. To examine the history of Gnosticism is not a tempting undertaking. On the one side, it is like walking into a fog, as dense and unpleasant as ever marked a London November; on the other, it is to disturb a moral cess-pool, proverbially better left alone. Of the five groups of the Gnostic family, which seem to agree in little beside worshipping the devil, holding to "emanations," and owing their origin to Simon Magus, the particular group that made Alexandria its headquarters acknowledged as its leading names Basilides, Valentine, and Mark, each of whom outdid the other in the absurdity of his ravings about eons, generations, and the like, and in the abominableness of his practical licentiousness. Valentine and Mark were contemporaries of Clement, if not personally (Valentine is said to have died A.D. 150) at least in their immediate influence. No one can tell satisfactorily what made these precious followers of Simon Magus spend their days in patching up second-hand systems out of the rags of cast-off Oriental mysticism. No doubt their jargon appeared somewhat less {55} unnatural in their own days than it does in ours. They lived nearer the times when the wrecks of primeval revelation and history had been wrought into a thousand fantastic shapes on the banks of the Indus, the Euphrates, and the Nile, and when, in the absence of the true light, men occupied themselves with the theatrical illuminations of Bel, Isis, and Vishnu. But these Gnostics, in the clear dawn of the Gospel, still stuck to the fulsome properties of the devil's play-house. Unsavory and dishonest, they deserve neither respect for sincerity nor allowance for originality; they were mere spinners of "endless genealogies," and, with such a fig-leaf apron, they tried to conceal for a while the rankness of the flesh that finally made the very pagans join in hounding them from the earth. The infamous Mark was holding his conventicles in Alexandria about the very time that Pantaenus and Clement were teaching. To read of his high-flown theories about eons and emanations, his sham magic, his familiarity with demons, his impositions on the weaker sex, and the frightful licentiousness that was the sure end of it all, is like reading the history of the doings of the Egyptian priests in the Serapeion rather than of those who called themselves Christians. And yet these very men, these deluded Marcosians, gave out to learned and unlearned Alexandria that they alone were the true followers of Christ. We may conceive the heart-breaking work it would be for