If I must needs glory, I will glory of the things which concern mine infirmities. I will glory - which concern mine infirmities - I will not boast of my natural or acquired powers; neither in what God has done by me; but rather in what I have suffered for him.
Many persons have understood by infirmities what they call the indwelling sin of the apostle, and say that "he gloried in this, because the grace of Christ was the more magnified in his being preserved from ruin, notwithstanding this indwelling adversary." And to support this most unholy interpretation, they quote those other words of the apostle, 2 Corinthians 12:9 : Most gladly therefore will I rather glory in my infirmities, my indwelling corruptions, that the power of Christ, in chaining the fierce lion, may rest upon me. But it would be difficult to produce a single passage in the whole New Testament where the word ασθενεια, which we translate infirmity, has the sense of sin or moral corruption. The verb ασθενεω signifies to be weak, infirm, sick, poor, despicable through poverty, etc. And in a few places it is applied to weakness in the faith, to young converts, who are poor in religious knowledge, not yet fully instructed in the nature of the Gospel; Romans 4:19; Romans 14:1, Romans 14:2. And it is applied to the works of the law, to point out their inability to justify a sinner, Romans 8:3. But to inward sin, and inward corruption it is never applied. I am afraid that what these persons call their infirmities may rather be called their strengths; the prevailing and frequently ruling power of pride, anger, ill-will, etc.; for how few think evil tempers to be sins! The gentle term infirmity softens down the iniquity; and as St. Paul, so great and so holy a man, say they, had his infirmities, how can they expect to be without theirs? These should know that they are in a dangerous error; that St. Paul means nothing of the kind; for he speaks of his sufferings, and of these alone. One word more: would not the grace and power of Christ appear more conspicuous in slaying the lion than in keeping him chained? in destroying sin, root and branch; and filling the soul with his own holiness, with love to God and man, with the mind - all the holy heavenly tempers, that were in himself; than in leaving these impure and unholy tempers, ever to live and often to reign in the heart? The doctrine is discreditable to the Gospel, and wholly antichristian.