25 How she answered Him, you have already heard above. “In the gathering of the nations into one.” Herein she answered Him, in unity: he who is not in unity, answers Him not. For He is One, the Church is unity: none but unity answers to Him who is One....Since some were destined to say against her, She has existed, and no longer does exist; “Show me,” He says, “the shortness of my days,” what is it, that I know not what apostates from me murmur against me? Why is it that lost men contend that I have perished? For they surely say this, that I have been, and no longer am: “Show me the shortness of my days.” I do not ask from You about those everlasting days: they are without end, where I shall be; it is not those I ask of: I ask of temporal days; show unto me my temporal days; “show me the shortness,” not the eternity, “of my days.” Declare unto me, how long I shall be in this world: on account of those who say, “She has been,” and is no more: on account of those who say, The Scriptures are fulfilled, all nations have believed, but the Church has become apostate, and has perished from among all nations....
Source: The Enarrations, or Expositions, on the Psalms (New Advent)