“I, therefore, confess that all our righteousness, by which we are acceptable to God, and in which alone we ought wholly to rest, consists in the remission of sins which he purchased for us, by washing us in his own blood, and through that one sacrifice by which he appeased the wrath of God that had been provoked against us. And I hold the pride of those intolerable who attribute to themselves one particle of merit, in which one particle of the hope of salvation can reside.
Meanwhile, however, I acknowledge that Jesus Christ not only justifies us by covering all our faults and sins but also sanctifies us by his Spirit, so that the two things (the free forgiveness of sins and reformation to a holy life) cannot be dissevered and separated from each other. Yet since until such time as we quit the world, much impurity, and very many vices remain in us, (to which it is owning that whatever good works we perform by the agency of the Holy Spirit, have some taint adhering to them,) we must always betake ourselves to that free righteousness, flowing from the obedience which Jesus Christ performed in our name, seeing that it is in his name we are accepted, and God does not impute our sins to us.
I wish the reader to understand that as often as we mention faith alone in the question, we are not thinking of a dead faith, which worketh not by love, but holding faith to the only cause of justification (Galatians 5:6; Romans 3:22). It is, therefore, faith alone which justifies, and yet the faith which justifies is not alone” (John Calvin).