“Why, then, are we justified by faith? Because faith we apprehend the righteousness of Christ, which is the only medium of our reconciliation to God. But this [justification] you cannot attain, without at the same time attaining to sanctification…. Christ therefore justifies no one whom he does not also sanctify. For these benefits are perpetually and indissolubly connected, so that whom he illuminates with his wisdom, them he redeems; whom he redeems, he justifies; whom he justifies, he sanctifies…. Since, then, the Lord affords us the enjoyment of these blessings only in the bestowment of himself, he gives them [justification and sanctification] both together, and never one without the other. Thus we see how true it is that we are justified, not without works, yet not by works; since union with Christ, by which we are justified, contains sanctification as well as righteousness.”

- John Calvin, Institutes of the Christian Religion,
trans. John Allen (Grand Rapids: Eerdmans, 1949), III: xvi, 1.