The very word "confirm" implies that the souls of Christ’s disciples need strengthening. If there were no temptations to try, no sharp sorrows to grieve, no painful afflictions to distress them; or if, on the other hand, there were no sensible weakness of soul, no sinking of heart, no despondency of spirit, no giving way of faith and hope, no doubt or fear in the mind, how could the souls of the disciples be strengthened?
The souls of God’s people are not made of cast iron, against which arrow after arrow may be discharged and leave no dent, make no impression. The hearts of the Lord’s people are in a measure conformed to the heart of Christ. And what was his heart? "My heart," he says, "is like wax; it is melted in the midst of my bowels."
And thus the Lord’s people, who carry in their bosom broken hearts and contrite spirits, made so by grace, are often sinking, often shaken, often cast down through the many trials they have to encounter. It is for this reason that they need confirming, supporting, strengthening, and that the Lord himself would lay his everlasting arms underneath them, lift them into his bosom, and make his strength perfect in their weakness. And is not this the gospel way?
Can I, by dint of creature exertion, brace up my soul to a certain pitch? If trouble come, am I like a patient sometimes under the keen knife of the surgeon to brace up my nerves to bear the operation more unflinchingly? This is nature, flesh, reason; not grace. The Lord does not require this of his people. He dealt not so with his beloved Apostle, according to the account which he gives in 2 Corinthians 12. What did the Lord speak into his heart, under trial and temptation, that he might proclaim it upon Zion’s walls to the Church of the living God, "My grace is sufficient for thee; for my strength is made perfect in weakness." Therefore, he adds, "Most gladly therefore will I rather glory in my infirmities, that the power of Christ may rest upon me."
But it is very painful to the Lord’s people to find no strength when they want it most, no faith when they have the greatest need of it, no help when most required. To pass through this experience baffles and disconcerts many of the living family; but when the Lord is pleased in a mysterious way to communicate his own strength, and to make it perfect in weakness; when he deals with them, as with the worthies of old, who "out of weakness were made strong," they can then bless the Lord for their very weakness, and, like Paul, glory in their infirmities, because the power of Christ rests upon them.