The Great Commentary of Cornelius à Lapide
2 Corinthians 12:9
For my strength is made perfect in weakness. This is a general proposition, a moral axiom applying to any weakness, but properly and primarily to that thorn of concupiscence just mentioned. These are the words of God in answer to the prayers of S. Paul. The greater the temptation of the flesh is, the greater is the strength supplied by Christ. This explains the paradox that follows: "When I am weak then am I strong."
The strength is both Paul's and God's Paul's as the receiver, God's as the Giver. Therefore, the Divine power is best manifested in weakness when, (1.) in those that are weak it works fortitude, patience, and other superhuman works. (2.) When he by whom anything is done, conscious of his own weakness, claims nothing for himself, but gives all the praise to God. Observe here the difference between the power of God and the power of the world. One is seen in force and violence, the other in endurance. (3.) Infirmity is the object of patience, fortitude, and temperance, in the same way that those who are infirm are more sober when they are ill. (4.) Infirm people keep the most careful watch over themselves, and prudently refuse whatever is noxious, and so become more self-controlled by habit (S. Thomas). Certainly, virtue feeds on opposition, and, therefore, by temptation, chastity becomes constant, and every virtue more robust, as we see in the lives of Joseph, Susannah, Paul, and others. (5.) S. Augustine says mystically (de Gratia Christ. c. 12), as does Anselm: "Fortitude is a true knowledge and humble confession of our infirmity." And S. Jerome says, writing, to Ctesiphon: "The one perfection to be found in this life is to recognise our imperfection." By this you learn not to trust to your own strength, but to cast yourself wholly with perfect confidence on the power of God, who strengthens the humble and those that hope in Him, and makes them as it were almighty, as S. Bernard says (Serm. 85 in Cantic.), able to pass unscathed through all temptations, labours, and dangers.
S. Augustine gives us an instance of this in his own life (cf. lib. viii. c. 11). He says. " When habit that seemed to me irresistible said to me, 'Can you live without them?' " (the concubines that he had been accustomed to have), " there appeared to me in the direction to which I had turned my face, while shrinking from setting out that way, the pure dignity of continence, with dignified mien, inviting me to come without hesitation, holding out, to welcome and embrace me, holy hands filled with hosts of good examples. There were multitudes of boys and girls, and many a youth; all ages were there, sober widows and aged virgins. She smiled encouragingly upon me, as much as to say, 'Can you not do what these men and women have done? They did it not in their own strength, but in the Lord their God. He gave me to them. Why do you stand in yourself and fall? Cast yourself upon Him; fear not. He will not withdraw and cause you to fall. Boldly trust yourself to Him. He will receive you and will heal you.'"
Lastly, virtue is made perfect in weakness, because, as S. Bernard (Ep. 254) says, in a robust and vigorous body the mind lies effeminate and lukewarm, and again in a weak and sickly body the spirit grows stronger and more vigilant. As one to whom nature has denied strength excels in intellect, so where God withholds health He gives robustness and vigour of mind, so that the mind afflicted with a feeble body sighs after its resurrection and after heaven; spurns whatever is transient, troubled, and exposed to decay; lives for the future life, not the present; thinks with Plato that this life is death's mediator; in short, gives itself wholly to God and heavenly things. "The mind that is allied to disease is close to God," says Nazianzen. Listen to what a famous old man said to one of his disciples who enjoyed bad health (Vita. Patrum, lib. iii. n. 157). " Be not sad, my son, at your sickness and bodily ills. It is the highest duty of religion to give God thanks in weakness. If you are iron you lose your rust by fire; if you are gold you are tried by the fire and, proceed from great to greater. Be not distressed, then, my brother. If God wishes you to be tormented in the body, who are you that you should be angry with Him? Bear up then, and ask Him to give you what He sees fit."
S. Theophanes, Abbot of Sigrianum, a man who never had good health, A.D. 816, gave the following answer to the iconoclastic emperor, Leo the Armenian, who threatened him with dreadful tortures if he did not condemn the worship of images: " If you hope to terrify me with your threatenings, a man already worn out with disease and old age, as teachers threaten with a beating boys of no generous spirit, then let the pyre be kindled, let the instruments of torture be got ready, together with every engine of malicious cruelty, that you may know most clearly that the strength of Christ is made perfect in my weaknesses. I, who cannot walk on the ground, shall find my weakness changed into strength, and will leap upon the fire." And he was as good as his word; for after many temptations he was shut up in prison, and all access to him was forbidden; and so, being gradually weakened by hunger, filth, and disease, he offered up his soul in two years' time to God, as a sweet-smelling sacrifice, and after his death became illustrious for his miracles. The Church commemorates him on March 12th Cf. Baronius (Annals, A.D. 816). Cf. also S. Thomas and S. Chrysostom (Hom. 26), on the benefit of infirmities and tribulations.
Lastly, S. Bernard (Tract. de Grad. Humil.) says: "' Virtue is made perfect in weakness.' What virtue? Let the Apostle tell us: 'Gladly will I glory in my infirmities, that the virtue of Christ may rest upon me.' But perhaps you do not yet understand what special virtue he meant, since Christ had all virtues. But though all were found in Him, yet one in particular shone above all, viz., humility. This He commended to us in the words, 'Learn of Me, for I am meek and lowly of heart.' Gladly, then, 0 Lord Jesu, will I glory if I can in my infirmity, in my bodies illness, that Thy virtue, humility, may be made perfect in me; for when any virtue fails, Thy grace avails."
Most gladly, therefore, will I rather glory in my infirmities, that the power of Christ may rest upon me. Humility makes him glory not in his strength but in his infirmity; and so he calls upon Christ to give him strength, and tacitly says that he throws himself upon Him. Hence, by infirmity he means every kind of suffering, tribulation, temptation, humiliation, as is explained in the next verse. Infirmity, then, is a generic term, including anything that causes pain to mind or body. Hence (1.) it may embrace sicknesses, which, S. Basil says, formed Paul's thorn in the flesh; (2.) labours, such as are described in the preceding chapter; (3.) temptations of the flesh (ver. 7), or any other temptations; (4.) watchings, fastings, and other acts of mortification of the body, by which the body is weakened and made subject to the spirit; (5.) insults, persecutions, dangers, blows, and all afflictions borne for the sake of the faith of the Gospel.
Let them that are infirm console themselves amidst their infirmities by the thought that the power of Christ tabernacles in them as in its proper home. The power of God shows itself most where there is most need for it, and gives the greatest help when necessity is greatest. "To Thee," says the prophet "the poor is left: Thou wilt be a helper of the fatherless." For although naturally "bodily weakness involves also mental," as S. Jerome says (Pref. lib. ii. Comment. in Amos), and "the body which is corrupted weighs down the soul" (Wisd. 9:15), yet supernaturally it is otherwise; for the soul that is strengthened with grace strengthens also the body. S. Francis, for instance, increased in mental vigour as his body grew more feeble, so much so that in giving thanks to God he prayed that his sicknesses might be increased a hundredfold. "To fulfil Thy will, 0 Lord," he said, "is my exceeding comfort." See his Life by S. Bonaventura,
S. Bernard (Serm. 34 in Cantic.) says: " He does not say that he bears his infirmities patiently, but that he glories in them, and glories in them most gladly, proving that it was good for him to be humbled; for God loveth a cheerful giver. Humility alone which is joyous and unconstrained merits the grace which it receives." Again, in Sermon 25, he says: " We should wish for infirmity, which is supplemented by the power of Christ. Would that I might be not only weak, but destitute, and wholly wanting in anything of my own, that I might be strengthened by the might of the Lord of might; for strength is made perfect in weakness. And since this is the case, the bride beautifully turns it to her glory that she is held up to scorn by her rivals, and she glories, not only that she is comely but also that she is black. She thinks nothing more glorious than to bear the reproach of Christ. The ignominy of the Cross is pleasing to him who is not unpleasing to the Crucified."