Consider also that our Lord’s patience brings salvation, just as our beloved brother Paul also wrote you with the wisdom God gave him.
15. The long-suffering of our Lord. He takes it as granted that Christ defers the day of his coming, because he has a regard for our salvation. He hence animates the faithful, because in a longer delay they have an evidence as to their own salvation. Thus, what usually disheartens others through weariness, he wisely turns to a contrary purpose. Even as our beloved brother Paul.
The apostle, having instructed them in the doctrine of Christ's second coming, I. Takes occasion thence to exhort them to purity and godliness in their whole conversation: all the truths which are revealed in scripture should be improved for our advancement in practical godliness: this is the effect that knowledge must produce, or we are never the better for it.
Commenting on 2 Peter 3:11-18
And account that the longsuffering of our Lord,.... Not his longsuffering towards the wicked, and his forbearance with them, for that is not the means of, nor the way to, nor does it issue in, their salvation, but in their sorer punishment and greater damnation, see Rom 2:4; but towards the elect, as in Pe2 3:9; whom he bears much and long with before conversion...