Thomas Aquinas

“ Yet even now, as regards the particular sentence on each individual, the judgment does not at once take full effect since even the good will receive an increase of reward after the judgment, both from the added glory of the body and from the completion of the number of the saints. The wicked also will receive an increase of torment from the added punishment of the body and from the completion of the number of damned to be punished, because the more numerous those with whom they will burn, the more will they themselves burn. ”

“ Hence one man's reward is delayed for the good of others (Heb. 11:13, 39, 40) , and the punishment of one conduces to the profit of another. Consequently it is necessary that there should be another, and that a general judgment corresponding on the other hand with the first formation of things in being, in order that, to wit, just as then all things proceeded immediately from God, so at length the world will receive its ultimate complement, by each one receiving finally his own personal due. ”

“ Christ will appear in body, so that the Judge may be recognized in the body by all, and it is possible for this to take place suddenly. But speech which is measured by time would require an immense length of time, if the judgment took place by word of mouth.
Art. 3 - Whether the time of the future judgment is unknown? Objection 1: It would seem that the time of the future judgment is not unknown. For just as the holy Fathers looked forward to the first coming, so do we look forward to the second. ”

“ Notwithstanding the uncertainty of death, the uncertainty of the judgment conduces to watchfulness in two ways. First, as regards the thing ignored, since its delay is equal to the length of man's life, so that on either side uncertainty provokes him to greater care. Secondly, for the reason that a man is careful not only of his own person, but also of his family, or of his city or kingdom, or of the whole Church, the length of whose duration is not dependent on the length of man's life. ”

“ A great multitude can be enclosed in a small space. And all that is required is that in the neighborhood of that locality there be a space, however great, to contain the multitude of those who are to be judged, provided that Christ can be seen thence since being raised in the air, and shining with exceeding glory, He will be visible from a great distance. ”