Reply to Objection 5: As appears from the authority of Gregory quoted above (ad 3), the saints and angels will nothing but what they see to be in the Divine will: and so neither do they pray for aught else. Nor is their prayer fruitless, since as Augustine says (De Praed. Sanct. [*De Dono Persever. xxii]): "The prayers of the saints profit the predestinate, because it is perhaps pre-ordained that they shall be saved through the prayers of those who intercede for them": and consequently God also wills that what the saints see Him to will shall be fulfilled through their prayers.
Reply to Objection 6: The suffrages of the Church for the dead are as so many satisfactions of the living in lieu of the dead: and accordingly they free the dead from the punishment which the latter have not paid. But the saints in heaven are not in the state of making satisfaction; and consequently the parallel fails between their prayers and the suffrages of the Church.