To posit something absolutely infinite and then judge it to pass away and come to an end is to combine two contradictories. (1)
Hence their proofs themselves conjoin opposites, as when they say: “The existence of today, and of every other event, must depend on the elapse of a series that has an end; but for something without end to elapse is impossible.”
We reply: Granted, if a thing is infinite both at the beginning and at the end, its completion is impossible. Yet once you suppose that it has already elapsed and reached a limit, to maintain thereafter that its completion is impossible is self-contradictory; for you have already imagined it completed and finished on one side—the side of the terminus—though not on the side of the beginning.
A similar inconsistency appears in their “matching” argument: “Let us count the events up to the time of the Flood and the events up to the time of the Hijrah. When we place the two counts side by side, they must either be equal or differ. Equality is impossible, while difference would mean disparity within an infinite total, which is impossible.”
The answer is: These events are the very same events, only increased by the interval between the two moments—the time of the Flood and the time of the Hijrah. Whether you consider them identical or distinct, one set will be larger than the other; this disparity pertains to what is finite—the past. It is a difference within that part of the series that is bounded on one side, ⦗2/أ⦘ the side that has an end. If it is possible for something without beginning to come to an end in the future, then the disparity arises because it is finite, not because it is infinite—that is, because it lacks a beginning. But if the termination of what has no beginning is impossible, then your claim that the series of events terminates at the time (2) of the Flood or the Hijrah (3) is false.
For when it is said that the Lord has always been speaking