Calvin: Until Imputation of Righteousness "Union with God Cannot Be Hoped For"

"We yesterday compared this passage of Habakkuk with the interpretation of Paul, who draws this inference, that we are justified by faith without the works of the law, because the Prophet teaches us that we are to live by faith, for the way of life and of righteousness is the same, inasmuch as life is not to be otherwise sought by us than through the paternal favor of God. This then is our life--to be united to God; but this union with God cannot be hoped for by us while he imputes sins to us; for as he is just and cannot deny himself, iniquity must be ever hated by him. Then as long as he regards us as sinners, he must necessarily hold us as hateful to him. Where the hatred of God is, there is death and ruin. It then follows, that we can have no hope of life until we be reconciled to God, and there is no other way by which God can restore us to favor, but by regarding and counting us as just. It hence follows, that Paul reasons correctly, when he leads us from life to righteousness; for they are two things which are connected and inseparable." [emphasis added]

Calvin, John. Complete Commentaries - Habakkuk.