Cap. IX Arg. 12 Sol: right prayer for others does not require certain faith that our prayers will save them — outcomes are contingent; command to pray for all (even enemies) suffices
To form prayers rightly for other people, we need not be persuaded by certainty of faith that our prayers will profit them unto salvation. Nothing false or contingent can underlie our faith; yet whether they will gain any profit from our prayers is plainly contingent and uncertain. It is enough that God has commanded us to embrace all men in charity, and to pray for others — even for enemies.
Latin
Ad preces rite concipiendas pro aliis hominibus non requiritur, ut certitudine fidei nobis persuasum sit, preces nostras illis ad salutem profuturas. Nam fidei nostrae nihil aut falsum aut contingens subesse potest; at plane contingens et incertum est, utrum illi aliquid emolumenti ex precibus nostris sint percepturi. Sufficit quod Deus praeceperit nos omnes homines charitate complecti, et pro aliis, etiam pro inimicis, orare.