Cap. IX Arg. 13 Sol: grant diligence profits only those God absolutely wills to save — still no sluggishness: honor of co-working for the elect (1 Cor. iii. 9; 2 Tim. ii. 10); woe if not preach (1 Cor. ix. 16)
But come nearer still. Grant that ministers' diligence can profit only those God absolutely wills to save, who cannot perish — still neither sluggishness nor sloth is allowed. First: to profit by one's ministry those God has loved exceedingly, and whom before the world's foundations he decreed absolutely to save, is greatly honorable and desirable. Who, with any drop of piety, if he knew for certain some infant was predestined by God, would not labor the more earnestly to be counted God's fellow-worker in promoting that one's salvation (1 Cor. 3:9)? So Paul was animated, who says all things are to be endured for the elect's sake (2 Tim. 2:10). Further: even this can shake torpor from ministers — though God will not suffer any of the elect to perish, yet by neglecting their office they themselves incur damnable guilt, per the Apostle: Woe to me if I do not preach the gospel (1 Cor. 9:16).
Latin
Verum adhuc aliquanto propius ad rem accedamus: Fac diligentiam ministrorum non posse prodesse nisi iis, quos Deus absolute vult servare, et qui perire non possunt, tamen nihil licet segnitiei neque socordiae. Primo, quia hoc ipsum prodesse suo ministerio iis, quos Deus eximie amavit, quosque ante jacta mundi fundamenta absolute servare decrevit, est valde honorificum et desiderabile. Quis enim, cui ulla inest pietatis guttula, si certo sciret aliquem infantem esse a Deo praedestinatum, non eo enixius laboraret ut in salute ejusdem promovenda Dei συνεργοὶ habeatur? 1 Cor. iii. 9. Sic Paulus animatus fuit, qui omnia propter electos sustinenda dicit, 2 Tim. ii. 10. Porro, vel illud potest ministris torporem excutere, quod licet Deus haud patietur ullum ex electis perire, tamen ipsi negligendo officium suum damnabilem reatum incurrant, juxta illud Apostoli, Vae mihi si non evangelizavero, 1 Cor. ix. 16.