10:3 - For though we walk in the flesh, we do not war after the flesh:

Epistle of Mathetes to Diognetus
They are in the flesh, but they do not live after the flesh.[21]
Clement of Alexandria Stromata Book II
And again he says, "Though in the flesh, we do not war after the flesh."[254]
Clement of Alexandria Stromata Book IV
"For though we walk in the flesh, we do not war after the flesh; for the weapons of our warfare are not carnal, but mighty through God to the demolition of fortifications, demolishing thoughts, and every high thing which exalteth itself against the knowledge of Christ."[87]
Origen Against Celsus Book VII
We say, then, that those who are stigmatized as "lamed and mutilated in spirit," as "living only for the sake of the body which is dead," are persons whose endeavour it is to say with sincerity: "For though we live[107]

10:4 - (For the weapons of our warfare are not carnal, but mighty through God to the pulling down of strong holds;)

Tertullian On Idolatry
war, nay, how will he serve even in peace, without a sword, which the Lord has taken away?[157]

10:5 - Casting down imaginations, and every high thing that exalts itself against the knowledge of God, and bringing into captivity every thought to the obedience of Christ;

Clement of Alexandria Stromata Book VII
For "to bring themselves into captivity," and to slay themselves, putting to death "the old man, who is through lusts corrupt," and raising the new man from death, "from the old conversation," by abandoning the passions, and becoming free of sin, both the Gospel and the apostle enjoin.[24]
Origen de Principiis Book III
The Apostle Paul also will bear testimony to the same point in the words: "Casting down imaginations, and every high thing that exalted itself against the knowledge of Christ."[289]
Origen Against Celsus Book IV
Yea, we even require a wisdom which will throw down all high things that rise against the knowledge of God,[3]
Origen Against Celsus Book V
And may God grant that we approach not our subject with our understanding and reason empty and devoid of divine inspiration, that the faith of those whom we wish to aid may not depend upon human wisdom, but that, receiving the "mind" of Christ from His Father, who alone can bestow it, and being strengthened by participating in the word of God, we may pull down "every high thing that exalteth itself against the knowledge of God,"[3]
Methodius From the Discourse on the Resurrection
that ye may be able to stand against the wiles of the devil; "casting down imaginations, and every high thing that exalteth itself against the knowledge of Christ,"[78]

10:9 - That I may not seem as if I would terrify you by letters.

Tertullian On Modesty
Come, now, if he had not "wholly saddened" so many persons in the first Epistle; if he had "rebuked" none, had "terrified"[150]

10:12 - For we dare not make ourselves of the number, or compare ourselves with some that commend themselves: but they measuring themselves by themselves, and comparing themselves among themselves, are not wise.

Clement of Alexandria Stromata Book III
ne "quis, cure" recte "stare videatur,"[6]

10:13 - But we will not boast of things without our measure, but according to the measure of the rule which God has distributed to us, a measure to reach even unto you.

Tertullian On Prayer
Touching such, however, as are betrothed, I can with constancy "above my small measure"[154]
Pseudo-Gregory Thaumaturgus A Sectional Confession of Faith
I have therefore whereof I may glory through Jesus Christ in those things which pertain to God. For I dare not to speak of any of those things which Christ hath not wrought by me,[51]
The Teaching of Simon Cephas In the City of Rome
And, when there was great rejoicing at his teaching, he built churches there, in Rome and in the cities round about, and in all the villages of the people of Italy; and he served there in the rank of the Superintendence of Rulers twenty-five years.[17]

10:15 - Not boasting of things without our measure, that is, of other men's labours; but having hope, when your faith is increased, that we shall be enlarged by you according to our rule abundantly,

Clement of Alexandria Stromata Book VI
The primacy of knowledge the apostle shows to those capable of reflection, in writing to those Greeks of Corinth, in the following terms: "But having hope, when your faith is increased, that we shall he magnified in you according to our rule abundantly, to preach the Gospel beyond you."[308]

10:17 - But he that glories, let him glory in the Lord.

1 Clement
Let us therefore, brethren, be of humble mind, laying aside all haughtiness, and pride, and foolishness, and angry feelings; and let us act according to that which is written (for the Holy Spirit saith, "Let not the wise man glory in his wisdom, neither let the mighty man glory in his might, neither let the rich man glory in his riches; but let him that glorieth glory in the Lord, in diligently seeking Him, and doing judgment and righteousness"[63]
Epistle of Ignatius to Hero, a Deacon of Antioch
I do not glory in the world, but in the Lord. I exhort Hero, my son; "but let him that glorieth, glory in the Lord."[24]
Clement of Alexandria The Instructor Book I
But if human wisdom, as it remains to understand, is the glorying in knowledge, hear the law of Scripture: "Let not the wise man glory in his wisdom, and let not the mighty man glory in his might; but let him that glorieth glory in the Lord."[86]
The History of Joseph the Carpenter
Tell them also this word which I have said to you to-day: Let not the strong man glory in his strength, nor the rich man in his riches; but let him who wishes to glory, glory in the Lord.[8]