Cap. V Obj. 8 Sol: God saves through faith — cause of the willed, not of the willing
God saves through faith, and decrees to save through faith — yet so that faith counts as an antecedent cause or condition not of the decree itself, but of the thing decreed. An effect of the divine will can proceed from a cause God foresaw from eternity and whose order to the caused he willed: that is called a cause of the thing willed, not of the willing.
Latin
Deus salvat per fidem, et Deus decernit servare per fidem; ita tamen ut fides intelligatur habere respectum causae vel conditionis antecedentis, non quoad ipsum decretum, sed quoad rem decretam. Effectus Divinae voluntatis potest procedere ex aliqua causa quam Deus ab aeterno praescivit, ipsumque ordinem causae ad causatum voluit: Et hoc dicitur causa voliti, non volendi.