Durandus: grace and charity differ only in name
Thesis XXIII. Some, on the other hand, such as Durandus, hold that there is no difference at all between grace and charity. They say the two are not distinguished even in concept, only in name.
Charity and grace, on this view, are no more distinct than being dear and being pleasing: it is called grace because by it a man becomes pleasing (gratus) to God, and charity because by it he is made dear (charus) to God.
Latin
XXIII. Nonnulli contra, ut Durandus, nihil omnino interesse volunt inter gratiam, & charitatem: ac nequidem ratione, sed solo nomine distingui affirmant. Neque magis distinctas esse charitatem & gratiam, quam esse charum & gratum. Gratiam enim dici, quia per illam homo fit Deo gratus: charitatem vero, quoniam per illam homo redditur Deo charus.