The two defined: for others' salvation, or chiefly one's own
Thesis XII. So for them grace freely given is a supernatural gift, given without any debt, chiefly for the spiritual salvation of others. The grace that makes pleasing is a supernatural gift, given without any debt, chiefly for each person's own spiritual salvation.
Both kinds serve the salvation of the receiver and of others alike. The difference is that the grace that makes pleasing is given chiefly for the salvation of the one who receives it and only secondarily for others: first we ourselves are to be made holy and righteous, and then others are to see our good works and glorify our Father in heaven.
Grace freely given, by contrast, looks chiefly to the salvation of others. It consists of gifts that do not of themselves directly serve the salvation of the person in whom they are, but are a great help in bringing others to repentance and faith.
Latin
XII. Igitur gratia gratis data ipsis est donum supernaturale, absque ullo debito, ad aliorum spiritualem salutem praecipue collatum. Gratia vero gratum faciens donum supernaturale, absque ullo debito, ad propriam uniuscujusque salutem spiritualem potissimum datum. Licet enim commune sit gratiae gratis datae cum gratia gratum faciente, ut tam propriae quam alienae saluti conducant: tamen illud interest, quod gratia gratum faciens datur potissimum ad propriam salutem illius qui accipit; secundario vero ad salutem aliorum: nimirum ut nos ipsi primum sancti justique efficiamur, deinde caeteri videant opera nostra bona, & glorificent Patrem nostrum qui in coelis est. Contra vero gratia gratis data alienam salutem spectat praecipue. Constat enim iis donis quae directe & per se, ad salutem ejus in quo sunt, non conducunt; sed multum juvant ad alios ad poenitentiam & fidem adducendos.