"There might be probation after probation even in the world to come. But some human souls would continue obstinately and unrepentingly set in wickedness, age after age, and probation after probation: for the possible malice of the will is vastly great. What is to become of such obstinate charaders? It seems against the idea of probation, that periods of trial should succeed one another in an endless series. . . . . The series of probations must end somewhere. And then?" (Ethics and Natural Law, p. 166.) "All this speculation, be it understood, lies apart from revelation" (ib. p. 165). St Thomas however presently (Chap. XCV) argues the notion of any probation at all in the next world to be an a priori impossibility.
Of God and His Creatures: 4.92