_Third question._--“Is absolute and standing duration a created or an uncreated reality?” This question is easily answered; for, in the first place, standing duration is the duration of a being altogether unchangeable; and nothing unchangeable is created. Hence standing duration is an uncreated reality. On the other hand, all that is created is changeable and constantly subject to movement; hence all created (that is, contingent) duration implies succession. Therefore standing duration is not to be found among created realities. Lastly, standing duration, as involving in itself all conceivable past and all possible future, is infinite, and, as forming the ground of all contingent actualities, is nothing less than the formal possibility of infinite terms of real successive duration. But such a possibility can be found in God alone. Therefore the reality of standing duration is in God alone; and we need not add that it must be uncreated. _Fourth question._--“What reality, then, is absolute standing duration?” We answer that this duration is the infinite virtuality or extrinsic terminability of God’s eternity. For nowhere but in God’s eternity can we find the reason of the possibility of infinite terms and intervals of duration. Of course, God’s eternity, considered absolutely _ad intra_, is nothing else than the immobility of God’s existence; but its virtual comprehension of all possible terms of successive duration constitutes the absolute duration of God’s existence, inasmuch as the word “duration” expresses a virtual extent corresponding to all possible contingent duration; for God’s duration, though formally simultaneous, virtually extends beyond all imaginable terms and intervals of contingent duration. Hence standing duration is the duration of God’s eternity, the first and fundamental ground of flowing duration, the infinite range through which the duration of changeable things extend. In other words, the infinite virtuality of God’s eternity, as equivalent to an infinite length of time, is _duration_; and as excluding from itself all intrinsic change, is _standing_ duration. This virtuality of God’s eternity is really nothing else than its extrinsic terminability; for eternity is conceived to correspond to all possible differences of time only inasmuch as it can be compared with the contingent terms by which it can be extrinsically terminated.