Faithful is he that calleth you
Into the fellowship of his Son, and to his kingdom and glory, and who continues to do so, not only externally by his word, but internally by his Spirit and grace.
Who also will do it.
Two things the apostle mentions as the ground of confidence that the above petition, would be heard and answered; that is, that God would wholly sanctify them, and preserve the whole of them blameless to the coming of Christ; and they are the faithfulness of God, and the effectual calling of his saints. God is faithful to his word, his covenant and promises; he has promised to sanctify and cleanse his people from all their sins, and to preserve them safe to his kingdom and glory; agreeably the Arabic version renders this last clause, "and will execute his promise": and the effectual calling is a sure pledge of glorification; whom God calls he justifies and glorifies; as sure as he gives grace, he will give glory; and whom he calls to his eternal glory, he will make perfect, stablish, strengthen, and settle. The Complutensian edition reads, "who also will make your hope firm"; that is, with respect to the above things.