Chapter I.--Introductory. 
As Scripture has called the Greeks pilferers of the Barbarian  philosophy, it will next have to be considered how this may be briefly demonstrated. For we shall not only show that they have imitated and copied the marvels recorded in our books; but we shall prove, besides, that they have plagiarized and falsified (our writings being, as we have shown, older) the chief dogmas they hold, both on faith and knowledge and science, and hope and love, and also on repentance and temperance and the fear of God,--a whole swarm, verily, of the virtues of truth.
Whatever the explication necessary on the point in hand shall demand, shall be embraced, and especially what is occult in the barbarian philosophy, the department of symbol and enigma; which those who have subjected the teaching of the ancients to systematic philosophic study have affected, as being in the highest degree serviceable, nay, absolutely necessary to the knowledge of truth. In addition, it will in my opinion form an appropriate sequel to defend those tenets, on account of which the Greeks assail us, making use of a few Scriptures, if perchance the Jew also may listen  and be able quietly to turn from what he has believed to Him on whom he has not believed. The ingenuous among the philosophers will then with propriety be taken up in a friendly exposure both of their life and of the discovery of new dogmas, not in the way of our avenging ourselves on our detractors (for that is far from being the case with those who have learned to bless those who curse, even though they needlessly discharge on us words of blasphemy), but with a view to their conversion; if by any means these adepts in wisdom may feel ashamed, being brought to their senses by barbarian demonstration; so as to be able, although late, to see clearly of what sort are the intellectual acquisitions for which they make pilgrimages over the seas. Those they have stolen are to be pointed out, that we may thereby pull down their conceit; and of those on the discovery of which through investigation they plume themselves, the refutation will be furnished. By consequence, also we must treat of what is called the curriculum of study--how far it is serviceable;  and of astrology, and mathematics, and magic, and sorcery. For all the Greeks boast of these as the highest sciences. "He who reproves boldly is a peacemaker."  We have often said already that we have neither practiced nor do we study the expressing ourselves in pure Greek; for this suits those who seduce the multitude from the truth. But true philosophic demonstration will contribute to the profit not of the listeners' tongues, but of their minds. And, in my opinion, he who is solicitous about truth ought not to frame his language with artfulness and care, but only to try to express his meaning as he best can. For those who are particular about words, and devote their time to them, miss the things.  It is a feat fit for the gardener to pluck without injury the rose that is growing among the thorns; and for the craftsman to find out the pearl buried in the oyster's flesh. And they say that fowls have flesh of the most agreeable quality, when, through not being supplied with abundance of food, they pick their sustenance with difficulty, scraping with their feet. If any one, then, speculating on what is similar, wants to arrive  at the truth [that is] in the numerous Greek plausibilities, like the real face beneath masks, he will hunt it out with much pains. For the power that appeared in the vision to Hermas said, "Whatever may be revealed to you, shall be revealed."