“Justification and sanctification, gifts of grace, go together as if tied by an inseparable bond, so that if anyone tries to separate them, he is, in a sense, tearing Christ to pieces. Sanctification doesn’t just flow from justification, so that one produces the other. Both come from the same Source. Christ justifies no one whom He does not also sanctify. By virtue of our union with Christ, He bestows both gifts, the one never without the other.”
Calvin’s Commentary on 1 Corinthians 1:30, p. 93.