2 Corinthians 12:9

Irenaeus Against Heresies Book III

Long-suffering therefore was God, when man became a defaulter, as foreseeing that victory which should be granted to him through the Word. For, when strength was made perfect in weakness,[375]

Tertullian Against Marcion Book I

All proof of abstinence is lost when excess is impossible; for sundry things have thus their evidence in their contraries. Just as "strength is made perfect in weakness,"[368]

Tertullian Against Marcion Book V

Is he then the same God as He who gave Satan power over the person of Job that his "strength might be made perfect in weakness? "[589]

Tertullian On the Resurrection of the Flesh

He will love the flesh which is, so very closely and in so many ways, His neighbour-(He will love it), although infirm, since His strength is made perfect in weakness;[62]

Tertullian On the Resurrection of the Flesh

In this way also "shall strength be made perfect in weakness,"[333]

Tertullian On Modesty

Lastly, when Paul is praying the Lord for its removal, what does he hear? "Hold my grace sufficient; for virtue is perfected in infirmity."[133]

Tertullian De Fuga in Persecutione

For in other respects, too, injustice in proportion to the enmity it displays against righteousness affords occasion for attestations of that to which it is opposed as an enemy, that so righteousness may be perfected in injustice, as strength is perfected in weakness.[4]