Scripture the Criterion by Which Truth and Heresy are Distinguished
But those who are ready to toil in the most excellent pursuits, will not desist from the search after truth, till they get the demonstration from the Scriptures themselves.
There are certain criteria common to men, as the senses; and others that belong to those who have employed their wills and energies in what is true—the methods which are pursued by the mind and reason, to distinguish between true and false propositions.
Now, it is a very great thing to abandon opinion, by taking one's stand between accurate knowledge and the rash wisdom of opinion, and to know that he who hopes for everlasting rest knows also that the entrance to it is toilsome “and strait.” And let him who has once received the Gospel, even in the very hour in which he has come to the knowledge of salvation, “not turn back, like Lot's wife,” as is said; and let him not go back either to his former life, which adheres to the things of sense, or to heresies. For they form the character, not knowing the true God. “For he that loves father or mother more than Me,” the Father and Teacher of the truth, who regenerates and creates anew, and nourishes the elect soul, “is not worthy of Me”— He means, to be a son of God and a disciple of God, and at the same time also to be a friend, and of kindred nature. “For no man who looks back, and puts his hand to the plough, is fit for the kingdom of God.”
But, as appears, many even down to our own time regard Mary, on account of the birth of her child, as having been in the puerperal state, although she was not. For some say that, after she brought forth, she was found, when examined, to be a virgin.
Now such to us are the Scriptures of the Lord, which gave birth to the truth and continue virgin, in the concealment of the mysteries of the truth. “And she brought forth, and yet brought not forth,” says the Scripture; as having conceived of herself, and not from conjunction. Wherefore the Scriptures have conceived to Gnostics; but the heresies, not having learned them, dismissed them as not having conceived.
Now all men, having the same judgment, some, following the Word speaking, frame for themselves proofs; while others, giving themselves up to pleasures, wrest Scripture, in accordance with their lusts. And the lover of truth, as I think, needs force of soul. For those who make the greatest attempts must fail in things of the highest importance; unless, receiving from the truth itself the rule of the truth, they cleave to the truth. But such people, in consequence of falling away from the right path, err in most individual points; as you might expect from not having the faculty for judging of what is true and false, strictly trained to select what is essential. For if they had, they would have obeyed the Scriptures.
As, then, if a man should, similarly to those drugged by Circe, become a beast; so he, who has spurned the ecclesiastical tradition, and darted off to the opinions of heretical men, has ceased to be a man of God and to remain faithful to the Lord. But he who has returned from this deception, on hearing the Scriptures, and turned his life to the truth, is, as it were, from being a man made a god.
For we have, as the source of teaching, the Lord, both by the prophets, the Gospel, and the blessed apostles, “in various manners and at sundry times,” leading from the beginning of knowledge to the end. But if one should suppose that another origin was required, then no longer truly could an origin be preserved.
He, then, who of himself believes the Scripture and voice of the Lord, which by the Lord acts to the benefiting of men, is rightly [regarded] faithful. Certainly we use it as a criterion in the discovery of things. What is subjected to criticism is not believed till it is so subjected; so that what needs criticism cannot be a first principle. Therefore, as is reasonable, grasping by faith the indemonstrable first principle, and receiving in abundance, from the first principle itself, demonstrations in reference to the first principle, we are by the voice of the Lord trained up to the knowledge of the truth.
For we may not give our adhesion to men on a bare statement by them, who might equally state the opposite. But if it is not enough merely to state the opinion, but if what is stated must be confirmed, we do not wait for the testimony of men, but we establish the matter that is in question by the voice of the Lord, which is the surest of all demonstrations, or rather is the only demonstration; in which knowledge those who have merely tasted the Scriptures are believers; while those who, having advanced further, and become correct expounders of the truth, are Gnostics. Since also, in what pertains to life, craftsmen are superior to ordinary people, and model what is beyond common notions; so, consequently, we also, giving a complete exhibition of the Scriptures from the Scriptures themselves, from faith persuade by demonstration.
And if those also who follow heresies venture to avail themselves of the prophetic Scriptures; in the first place they will not make use of all the Scriptures, and then they will not quote them entire, nor as the body and texture of prophecy prescribe. But, selecting ambiguous expressions, they wrest them to their own opinions, gathering a few expressions here and there; not looking to the sense, but making use of the mere words. For in almost all the quotations they make, you will find that they attend to the names alone, while they alter the meanings; neither knowing, as they affirm, nor using the quotations they adduce, according to their true nature.
But the truth is not found by changing the meanings (for so people subvert all true teaching), but in the consideration of what perfectly belongs to and becomes the Sovereign God, and in establishing each one of the points demonstrated in the Scriptures again from similar Scriptures. Neither, then, do they want to turn to the truth, being ashamed to abandon the claims of self-love; nor are they able to manage their opinions, by doing violence to the Scriptures. But having first promulgated false dogmas to men; plainly fighting against almost the whole Scriptures, and constantly confuted by us who contradict them; for the rest, even now partly they hold out against admitting the prophetic Scriptures, and partly disparage us as of a different nature, and incapable of understanding what is peculiar to them. And sometimes even they deny their own dogmas, when these are confuted, being ashamed openly to own what in private they glory in teaching. For this may be seen in all the heresies, when you examine the iniquities of their dogmas. For when they are overturned by our clearly showing that they are opposed to the Scriptures, one of two things may be seen to have been done by those who defend the dogma. For they either despise the consistency of their own dogmas, or despise the prophecy itself, or rather their own hope. And they invariably prefer what seems to them to be more evident to what has been spoken by the Lord through the prophets and by the Gospel, and, besides, attested and confirmed by the apostles.
Seeing, therefore, the danger that they are in (not in respect of one dogma, but in reference to the maintenance of the heresies) of not discovering the truth; for while reading the books we have ready at hand, they despise them as useless, but in their eagerness to surpass common faith, they have diverged from the truth. For, in consequence of not learning the mysteries of ecclesiastical knowledge, and not having capacity for the grandeur of the truth, too indolent to descend to the bottom of things, reading superficially, they have dismissed the Scriptures. Elated, then, by vain opinion, they are incessantly wrangling, and plainly care more to seem than to be philosophers. Not laying as foundations the necessary first principles of things; and influenced by human opinions, then making the end to suit them, by compulsion; on account of being confuted, they spar with those who are engaged in the prosecution of the true philosophy, and undergo everything, and, as they say, ply every oar, even going the length of impiety, by disbelieving the Scriptures, rather than be removed from the honours of the heresy and the boasted first seat in their churches; on account of which also they eagerly embrace that convivial couch of honour in the Agape, falsely so called.
Source: The Stromata, or Miscellanies (New Advent)