8:1 - Now as concerning things offered unto idols, we know that we all have knowledge. Knowledge puffs up, but love edifies.

Epistle of Mathetes to Diognetus
The Apostle, perceiving the force [of this conjunction], and blaming that knowledge which, without true doctrine, is admitted to influence life,[66]
Irenaeus Against Heresies Book II
It is therefore better and more profitable to belong to the simple and unlettered class, and by means of love to attain to nearness to God, than, by imagining ourselves learned and skilful, to be found [among those who are] blasphemous against their own God, inasmuch as they conjure up another God as the Father. And for this reason Paul exclaimed, "Knowledge puffeth up, but love edifieth: "[214]
Clement of Alexandria Stromata Book I
But the "supposition of knowledge inflates," and fills with pride; "but charity edifieth," which deals not in supposition, but in truth. Whence it is said, "If any man loves, he is known."[143]
Clement of Alexandria Stromata Book II
But the knowledge of those who think themselves wise, whether the barbarian sects or the philosophers among the Greeks, according to the apostle, "puffeth up."[108]
Clement of Alexandria Stromata Book IV
And there are those who say that the knowledge about things sacrificed to idols is not promulgated among all, "lest our liberty prove a stumbling-block to the weak. For by thy knowledge he that is weak is destroyed. "[133]

8:2 - And if any man think that he knows any thing, he knows nothing yet as he ought to know.

Tertullian The Prescription Against Heretics
who also "thought that they knew somewhat, whereas they knew not yet anything, as they ought to know."[296]
Tertullian On Modesty
and, "If any thinks himself to know, he knoweth not yet how it behaves him to know I"[144]
Cyprian Treatise XII Three Books of Testimonies Against the Jews
And again: "If any man thinketh that he knoweth anything, he knoweth not yet in what manner he ought to know."[536]

8:4 - As concerning therefore the eating of those things that are offered in sacrifice unto idols, we know that an idol is nothing in the world, and that there is no other God but one.

Epistle of Ignatius to the Antiochians
And those very apostles, who said "that there is one God,"[19]
Irenaeus Against Heresies Book III
For though there be that are called gods, whether in heaven or in earth; yet to us there is but one God, the Father, of whom are all things, and we through Him; and one Lord Jesus Christ, by whom are all things, and we by Him."[46]
Clement of Alexandria Stromata Book VI
Such, then, being the case, the Greeks ought by the Law and the Prophets to learn to worship one God only, the only Sovereign; then to be taught by the apostle, "but to us an idol is no, thing in the world,"[305]
Tertullian De Spectaculis
renounced all idols, they are utterly unsuitable. "Not that an idol is anything,"[15]
Tertullian Against Marcion Book V
He introduces his discussion about meats offered to idols with a statement concerning idols (themselves): "We know that an idol is nothing in the world."[316]
Origen Against Celsus Book VIII
" In reference to this statement, it would be profitable for us to take up and clearly explain the whole passage of the first Epistle to the Corinthians, in which Paul treats of offerings to idols.[50]
Novation On the Jewish Meats
And when this creature is taken for food, it nourishes the person who so takes it for the demon, not for God, by making him a fellow-guest with the idol, not with Christ, as rightly do the Jews also.[38]
Didache
bear what thou art able; but against that which is sacrificed to idols[71]

8:5 - For though there be that are called gods, whether in heaven or in earth, (as there be gods many, and lords many,)

Tertullian Against Marcion Book III
For the name of God, as being the natural designation of Deity, may be ascribed to all those beings for whom a divine nature is claimed,-as, for instance, even to idols. The apostle says: "For there be that are called gods, whether in heaven or in earth."[211]
Tertullian Against Marcion Book V
has become a common name (since in the world there are said and believed to be "gods many"[488]
Tertullian Against Hermogenes
For "although there be that are called gods" in name, "whether in heaven or in earth, yet to us there is but one God the Father, of whom are all things; "[45]
Five Books in Reply to Marcion
40 God all things made; "[213]
Origen Against Celsus Book IV
We know, moreover, that "though there be that are called gods, whether in heaven or in earth (as there be gods many and lords many), but to us there is one God, the Father, of whom are all things, and we in Him; and one Lord Jesus Christ, by whom are all things, and we by Him."[118]
Origen Against Celsus Book VIII
" To this effect Paul says, "For though there be that are called gods, whether in heaven or in earth, as there are gods many, and lords many."[10]
Origen Commentary on John Book I
" Those gods, then, are living of whom God is god. The Apostle, too, writing to the Corinthians, says:[153]

8:6 - But to us there is but one God, the Father, of whom are all things, and we in him; and one Lord Jesus Christ, by whom are all things, and we by him.

Epistle of Ignatius to the Tarsians
For says the apostle, "There is one God, the Father, of whom are all things; and one Lord Jesus Christ, by whom are all things."[15]
Epistle of Ignatius to the Philippians
And again, "One Lord Jesus Christ."[13]
Clement of Alexandria The Instructor Book II
But," he says, "through thy knowledge thy weak brother perishes, for whom Christ died; and they that wound the conscience of the weak brethren sin against Christ."[30]
Tertullian Against Marcion Book V
Marcion, however, does not say that the Creator is not God; so that the apostle can hardly be thought to have ranked the Creator amongst those who are called gods, without being so; since, even if they had been gods, "to us there is but one God, the Father."[317]
Hippolytus Dogmatical and Historical Fragments
For in this he has said only what Christ testifies of Himself. For Christ gave this testimony, and said, "All things are delivered unto me of my Father; "[219]
Pseudo-Gregory Thaumaturgus A Sectional Confession of Faith
For Paul addresses the Father as one in respect of divinity, and speaks of the Son as one in respect of lordship: "There is one God the Father, of whom are all things, and we for Him; and one Lord Jesus Christ, by whom are all things, and we by Him."[36]

8:7 - Nevertheless there is not in every man that knowledge: for some with conscience of the idol unto this hour eat it as a thing offered unto an idol; and their conscience being weak is defiled.

Clement of Alexandria The Instructor Book II
We must therefore abstain from these viands not for fear (because there is no power in them); but on account of our conscience, which is holy, and out of detestation of the demons to which they are dedicated, are we to loathe them; and further, on account of the instability of those who regard many things in a way that makes them prone to fall, "whose conscience, being weak, is defiled: for meat commendeth us not to God."[20]
Clement of Alexandria Stromata Book II
; sins of deed, by the rapacious and carnivorous birds. The sow delights in dirt and dung; and we ought not to have "a conscience" that is "defiled."[155]
Clement of Alexandria Stromata Book V
"Knowledge is not in all,"[44]
Tertullian On Modesty
But, so sinning, by shocking the weak consciences of the brethren thoroughly, they will sin against Christ."[148]

8:8 - But food commends us not to God: for neither, if we eat, are we the better; neither, if we eat not, are we the worse.

Clement of Alexandria The Instructor Book II
The natural use of food is then indifferent. "For neither if we eat are we the better," it is said, "nor if we eat not are we the worse."[22]
Clement of Alexandria Stromata Book IV
For it is not in the food of the belly, that we have heard good to be situated. But he has heard that"meat will not commend us,"[219]
Tertullian On Fasting
(finally), that so, too, does the apostle teach that "food commendeth us not to God; since we neither abound if we eat, nor lack if we eat not."[15]
Origen Against Celsus Book VIII
Paul also says, "Meat commendeth us not to God: for neither, if we eat, are we the better; neither, if we eat not, are we the worse."[58]
Cyprian Treatise XII Three Books of Testimonies Against the Jews
Paul, in the first to the Corinthians: "Meat commendeth us not to God; neither if we eat shall we abound, nor if we eat not shall we want."[686]
Origen Commentary on Matthew Book XI
And so neither by not eating, I mean by the very fact that we do not eat of the bread which has been sanctified by the word of God and prayer, are we deprived of any good thing, nor by eating are we the better by any good thing; for the cause of our lacking is wickedness and sins, and the cause of our abounding is righteousness and right actions; so that such is the meaning of what is said by Paul, "For neither if we eat are we the better, nor if we eat not are we the worse."[139]

8:10 - For if any man see you which have knowledge sit to eat in the idol's temple, shall not the conscience of him which is weak be emboldened to eat those things which are offered to idols;

Tertullian On Idolatry
will yet frequent the Quinquatria? The very first payment of every pupil he consecrates both to the honour and to the name of Minerva; so that, even though he be not said "to eat of that which is sacrificed to idols"[61]

8:11 - And through your knowledge shall the weak brother perish, for whom Christ died?

Irenaeus Against Heresies Book III
And again: "And through thy knowledge shall the weak brother perish, for whom Christ died; "[338]
Origen Commentary on Matthew Book XIII
But if we were to give more careful consideration to these things, we should be on our guard against sinning against the brethren, and wounding their conscience when it is weak, lest we sin against Christ;[144]

8:12 - But when all of you sin so against the brethren, and wound their weak conscience, all of you sin against Christ.

The Second Epistle of Clement Concerning Virginity
believers say, "Never will we eat flesh, that we may not make our brother to stumble."[24]

8:13 - Wherefore, if food make my brother to offend, I will eat no flesh while the world stands, lest I make my brother to offend.

Clement of Alexandria The Instructor Book II
"For if any of such meats make a brother to stumble, I shall not eat it as long as the world lasts," says he, "that I may not make my brother stumble."[28]
Origen Against Celsus Book VIII
and again, "If meat make my brother to offend, I will eat no flesh while the world standeth, lest I make my brother to offend."[56]
Cyprian Epistle LXI
Certainly let them not cause a scandal to the brethren or sisters, since it is written, "If meat cause my brother to offend, I will eat no flesh while the world standeth, lest I make my brother to offend."[9]