Cap. III Sol. Rat. 14: distinguish electing act from eternal life elected — dispositive vs motive
Sol. To solve this rightly, distinguish God's act of electing from the thing he elects to, that is, eternal life itself. A thing can work as a disposing cause toward producing it that could not have been a motive cause of the elector's intention. We do not deny that good works, or a holy and pious life, work that way toward attaining eternal life, and that God from eternity looked on the elect's holy life as preceding their entrance into the heavenly kingdom.
Latin
Sol. Ut hoc argumentum recte solvatur, distinguendum est inter ipsam actionem Dei eligentis ad vitam aeternam, et ipsam rem ad quam eligit, hoc est, ipsam vitam aeternam. Potest enim habere vim causae dispositivae quoad productionem rei, quod nullam habuit vim causae motivae quoad intentionem eligentis. Non imus inficias, bona opera, sive vitam sanctam et piam, isto modo operari ad consecutionem vitae aeternae, atque Deum ab aeterno intuitum fuisse hanc electorum sanctam vitam, tanquam praecedaneam ad illorum introitum in regnum caeleste.