Christ Is Where His Spirit Is
righteous. For if he who has obtained justification possesses Christ, and at the same time, Christ never is where His Spirit is not, it is obvious that gratuitous righteousness is necessarily connected with regeneration.... Wherever, therefore, that righteousness of faith, which we maintain to be gratuitous, is, there too Christ is, and where Christ is, there too is the Spirit of holiness, who regenerates the soul to newness of life.
John Calvin, Letter to Sadoleto