25 Nor indeed has the Holy Spirit failed to speak what should be of open and unshaken avail against these men, most shamelessly and madly obstinate, and should repel their assault, as of wild beasts, from His sheep-fold, by defences that may not be stormed. For, after He had said concerning eunuchs, “I will give unto them in My house and in My wall a named place, much better than of sons and daughters;” lest any too carnal should think that there was any thing temporal to be hoped for in these words, straightway He added, “An eternal name I will give unto them, nor shall it ever fail:” as though He should say, Why do you draw back, impious blindness?
Why do you draw back? Why do you pour the clouds of your perverseness over the clear (sky) of truth? Why in so great light of Scriptures do you seek after darkness from out which to lay snares? Why do you promise temporal advantage only to holy persons exercising continence? “An eternal name I will give unto them:” why, where persons keep from all sexual intercourse, and also in the very fact that they abstain from these, have thought of the things of the Lord, how to please the Lord, do you essay to refer them unto earthly advantage?
“An eternal name I will give unto them.” Why contend you that the kingdom of heaven, for the sake of which holy eunuchs have made themselves eunuchs, is to be understood in this life only? “An eternal name I will give unto them.” And if haply in this place you endeavor to take the word itself eternal in the sense of lasting for a long time, I add, I heap up, I tread in, “nor shall it ever fail.” What more seek you? What more say you? This eternal name, whatever it be, unto the eunuchs of God, which assuredly signifies a certain peculiar and excellent glory, shall not be in common with many, although set in the same kingdom, and in the same house. For on this account also, perhaps, it is called a name, that it distinguishes those, to whom it is given, from the rest.
Source: On Holy Virginity (New Advent)