Sacramental-Salvific interdependence
Christ, salvation, and sacrament thus belong together in the sixteenth century mind. This interdependence must be recognized in order to caution against the tendency to distinguish too sharply the eucharistic from the justification controversies of the sixteenth century. These controversies were more than merely contemporaneous. Indeed, it is a fact often overlooked in the the more modern distribution of loci, but there was a strong soteriological motivation underlying the eucharistic controversy.
Mark Garcia, Life in Christ: Union with Christ and Twofold Grace in Calvin's Theology (Eugene, OR: Wipf and Stock Publishers, 2008), 149