St. Gregory the Wonderworker: On the Content of the Christian Faith

There is one God, the Father of the living Word, who is His subsistent Wisdom and Power and Eternal Image: perfect Begetter of the perfect Begotten, Father of the only-begotten Son. There is one Lord, Only of the Only, God of God, Image and Likeness of Deity, Efficient Word, Wisdom comprehensive of the constitution of all things, and Power formative of the whole creation, true Son of true Father, Invisible of Invisible, and Incorruptible of Incorruptible, and Immortal of Immortal and Eternal of Eternal. And there is One Holy Spirit, having His subsistence from God, and being made manifest by the Son, to wit to men: Image of the Son, Perfect Image of the Perfect; Life, the Cause of the living; Holy Fount; Sanctity, the Supplier, or Leader, of Sanctification; in whom is manifested God the Father, who is above all and in all, and God the Son, who is through all. There is a perfect Trinity, in glory and eternity and sovereignty, neither divided nor estranged. Wherefore there is nothing either created or in servitude in the Trinity; nor anything superinduced, as if at some former period it was non-existent, and at some later period it was introduced. And thus neither was the Son ever wanting to the Father, nor the Spirit to the Son; but without variation and without change, the same Trinity abideth ever.

–A Declaration of Faith

St. Irenaeus of Lyons: On How Heretics Depart from Scripture and Tradition

Chapter II.-The Heretics Follow Neither Scripture Nor Tradition.

1. When, however, they are confuted from the Scriptures, they turn round and accuse these same Scriptures, as if they were not correct, nor of authority, and [assert] that they are ambiguous, and that the truth cannot be extracted from them by those who are ignorant of tradition. For [they allege] that the truth was not delivered by means of written documents, but vivâ voce: wherefore also Paul declared, “But we speak wisdom among those that are perfect, but not the wisdom of this world.” And this wisdom each one of them alleges to be the fiction of his own inventing, forsooth; so that, according to their idea, the truth properly resides at one time in Valentinus, at another in Marcion, at another in Cerinthus, then afterwards in Basilides, or has even been indifferently in any other opponent, who could speak nothing pertaining to salvation. For every one of these men, being altogether of a perverse disposition, depraving the system of truth, is not ashamed to preach himself.

2. But, again, when we refer them to that tradition which originates from the apostles, [and] which is preserved by means of the succession of presbyters in the Churches, they object to tradition, saying that they themselves are wiser not merely than the presbyters, but even than the apostles, because they have discovered the unadulterated truth. For [they maintain] that the apostles intermingled the things of the law with the words of the Saviour; and that not the apostles alone, but even the Lord Himself, spoke as at one time from the Demiurge, at another from the intermediate place, and yet again from the Pleroma, but that they themselves, indubitably, unsulliedly, and purely, have knowledge of the hidden mystery: this is, indeed, to blaspheme their Creator after a most impudent manner! It comes to this, therefore, that these men do now consent neither to Scripture nor to tradition.

3. Such are the adversaries with whom we have to deal, my very dear friend, endeavouring like slippery serpents to escape at all points. Where-fore they must be opposed at all points, if per-chance, by cutting off their retreat, we may succeed in turning them back to the truth. For, though it is not an easy thing for a soul under the influence of error to repent, yet, on the other hand, it is not altogether impossible to escape from error when the truth is brought alongside it.

–Against Heresies, Bk III

St. Athanasius: On Understanding the Scriptures

But for the searching of the Scriptures and true knowledge of them, an honourable life is needed, and a pure soul, and that virtue which is according to Christ; so that the intellect guiding its path by it, may be able to attain what it desires, and to comprehend it, in so far as it is accessible to human nature to learn concerning the Word of God. For without a pure mind and a modelling of the life after the saints, a man could not possibly comprehend the words of the saints. For just as, if a man wished to see the light of the sun, he would at any rate wipe and brighten his eye, purifying himself in some sort like what he desires, so that the eye, thus becoming light, may see the light of the sun; or as, if a man would see a city or country, he at any rate comes to the place to see it;—thus he that would comprehend the mind of those who speak of God must needs begin by washing and cleansing his soul, by his manner of living, and approach the saints themselves by imitating their works; so that, associated with them in the conduct of a common life, he may understand also what has been revealed to them by God, and thenceforth, as closely knit to them, may escape the peril of the sinners and their fire at the day of judgment, and receive what is laid up for the saints in the kingdom of heaven, which “Eye hath not seen, nor ear heard, neither have entered into the heart of man,” whatsoever things are prepared for them that live a virtuous life, and love the God and Father, in Christ Jesus our Lord: through Whom and with Whom be to the Father Himself, with the Son Himself, in the Holy Spirit, honour and might and glory for ever and ever. Amen.
–On the Incarnation, ch. 57

St. Hippolytus of Rome: On Aristotle’s Philosophy

Chapter XVII.-Aristotle; Duality of Principles; His Categories; His Psychology; His Ethical Doctrines; Origin of the Epithet “Peripatetic.”

Aristotle, who was a pupil of this (Plato), reduced philosophy into an art, and was distinguished rather for his proficiency in logical science, supposing as the elements of all things substance and accident; that there is one substance underlying all things, but nine accidents,-namely, quantity, quality, relation, where, when, possession, posture, action, passion; and that substance is of some such description as God, man, and each of the beings that can fall under a similar denomination. But in regard of accidents, quality is seen in, for instance, white, black; and quantity, for instance two cubits, three cubits; and relation, for instance father, son; and where, for instance at Athens, Megara; and when, for instance during the tenth Olympiad; and possession, for instance to have acquired; and action, for instance to write, and in general to evince any practical powers; and posture, for instance to lie down; and passion, for instance to be struck. He also supposes that some things have means, but that others are without means, as we have declared concerning Plato likewise. And in most points he is in agreement with Plato, except the opinion concerning soul. For Plato affirms it to be immortal, but Aristotle that it involves permanence; and after these things, that this also vanishes in the fifth body, which he supposes, along with the other four (elements),-viz., fire, and earth, and water, and air,-to be a something more subtle (than these), of the nature of spirit. Plato therefore says, that the only really good things are those pertaining to the soul, and that they are sufficient for happiness; whereas Aristotle introduces a threefold classification of good things, and asserts that the wise man is not perfect, unless there are present to him both the good things of the body and those extrinsic to it. The former are beauty, strength, vigour of the senses, soundness; while the things extrinsic (to the body) are wealth, nobility, glory, power, peace, friendship. And the inner qualities of the soul he classifies, as it was the opinion of Plato, under prudence, temperance, justice, fortitude. This (philosopher) also affirms that evils arise according to an opposition of the things that are good, and that they exist beneath the quarter around the moon, but reach no farther beyond the moon; and that the soul of the entire world is immortal, and that the world itself is eternal, but that (the soul) in an individual, as we have before stated, vanishes (in the fifth body). This (speculator), then holding discussions in the Lyceum, drew up from time to time his system of philosophy; but Zeno (held his school) in the porch called Poecilé. And the followers of Zeno obtained their name from the place-that is, from Stoa-(i.e., a porch), being styled Stoics; whereas Aristotle’s followers (were denominated) from their mode of employing themselves while teaching. For since they were accustomed walking about in the Lyceum to pursue their investigations, on this account they were called Peripatetics. These indeed, then, were the doctrines of Aristotle.

–The Refutation of All Heresies, Bk I

St. Justin Martyr: On His Conversion and on Philosophy

Chapter II.-Justin Describes His Studies in Philosophy.

“I will tell you,” said I, “what seems to me; for philosophy is, in fact, the greatest possession, and most honourable before God, to whom it leads us and alone commends us; and these are truly holy men who have bestowed attention on philosophy. What philosophy is, however, and the reason why it has been sent down to men, have escaped the observation of most; for there would be neither Platonists, nor Stoics, nor Peripatetics, nor Theoretics, nor Pythagoreans, this knowledge being one. I wish to tell you why it has become many-headed. It has happened that those who first handled it [i.e., philosophy], and who were therefore esteemed illustrious men, were succeeded by those who made no investigations concerning truth, but only admired the perseverance and self-discipline of the former, as well as the novelty of the doctrines; and each thought that to be true which he learned from his teacher: then, moreover, those latter persons handed down to their successors such things, and others similar to them; and this system was called by the name of him who was styled the father of the doctrine. Being at first desirous of personally conversing with one of these men, I surrendered myself to a certain Stoic; and having spent a considerable time with him, when I had not acquired any further knowledge of God (for he did not know himself, and said such instruction was unnecessary), I left him and betook myself to another, who was called a Peripatetic, and as he fancied, shrewd. And this man, after having entertained me for the first few days, requested me to settle the fee, in order that our intercourse might not be unprofitable. Him, too, for this reason I abandoned, believing him to be no philosopher at all. But when my soul was eagerly desirous to hear the peculiar and choice philosophy, I came to a Pythagorean, very celebrated-a man who thought much of his own wisdom. And then, when I had an interview with him, willing to become his hearer and disciple, he said, `What then? Are you acquainted with music, astronomy, and geometry? Do you expect to perceive any of those things which conduce to a happy life, if you have not been first informed on those points which wean the soul from sensible objects, and render it fitted for objects which appertain to the mind, so that it can contemplate that which is honourable in its essence and that which is good in its essence? ‘Having commended many of these branches of learning, and telling me that they were necessary, he dismissed me when I confessed to him my ignorance. Accordingly I took it rather impatiently, as was to be expected when I failed in my hope, the more so because I deemed the man had some knowledge; but reflecting again on the space of time during which I would have to linger over those branches of learning, I was not able to endure longer procrastination. In my helpless condition it occurred to me to have a meeting with the Platonists, for their fame was great. I thereupon spent as much of my time as possible with one who had lately settled in our city, -a sagacious man, holding a high position among the Platonists,-and I progressed, and made the greatest improvements daily. And the perception of immaterial things quite overpowered me, and the contemplation of ideas furnished my mind with wings, so that in a little while I supposed that I had become wise; and such was my stupidity, I expected forthwith to look upon God, for this is the end of Plato’s philosophy.

–Dialogue with Trypho