Isaias 56:3

Talibus argumentis utitur quoque Julius Cassianus, qui fixit princeps sectæ Docetarum. Inopere ceete De continentia, vel De castitate, his verbis dicit: “Nec dicat aliquis, quod quoniam talia habemus membra, ut aliter figurata sit femina, aliter vero masculus: illa quidera ad suscipiendum, hic vero ad seminandum, concessam esse a Deo consuetudinem. Si enim a Deo, ad quem tendimus, essethæc constitutio, non beatos dixisset esse eunuchos; neque propheta dixisset, eos ‘non esse arborem infrugiferam; transferens ab arbore ad hominem, qui sua sponte et ex instituto se castrat tall cogitatione.” Et pro impia opinione adhuc decertans, subjungit: “Quomodo autem non jure quis reprehenderit Servatorem, si nos transformavit, et ab errore liberavit, eta conjunctione membrorum, et additamentorum, et pudendomm?” in hoc eadem decernens cure Tatiano: hic autem prodiit ex schola Valentini. …

Et rursus cure dicit: “Bonum est homini uxorem non tangere, sed propter fornicationes unusquisque suam uxorem habeat;” id veluti exponens, rursus dicit: “Ne vos tentet Satanas.” Non enim iis, qui continenter utuntur matrimonio propter solam liberorum procreationem, dicit, “propter intemperantiam;” sed iis, qui finem liberorum procreationis cupiunt transilire: ne, cure nimium annuerit noster adversarius, excitet appetitionem ad alienas voluptates. Fortasse autem quoniam iis, qui juste vivunt, resistit propter æmulationem, et adversus eos contendit, volens eos ad suos ordines traducere, per laboriosam continentiam eis vult præbere occasionera. Merito ergo dicit: “Melius est matrimonio jungi quam uri,” ut “vir reddat debiturn uxori, et uxor viro, et ne frustrentur invicem” hoc divino ad generationera dato auxilio. …

3. Do you wish then to know in what manner the Word of God, who was again the Son of God, as He was of old the Word, communicated His revelations to the blessed prophets in former times? Well, as the Word shows His compassion and His denial of all respect of persons by all the saints, He enlightens them and adapts them to that which is advantageous for us, like a skilful physician, understanding the weakness of men. And the ignorant He loves to teach, and the erring He turns again to His own true way. And by those who live by faith He is easily found; and to those of pure eye and holy heart, who desire to knock at the door, He opens immediately. For He casts away none of His servants as unworthy of the divine mysteries. He does not esteem the rich man more highly than the poor, nor does He despise the poor man for his poverty. …

21. The old law had a different ideal of blessedness, for therein it is said: “Blessed is he who hath seed in Zion and a family in Jerusalem:” and “Cursed is the barren who beareth not:” and “Thy children shall be like olive-plants round about thy table.” Riches too are promised to the faithful and we are told that “there was not one feeble person among their tribes.” But now even to eunuchs it is said, “Say not, behold I am a dry tree,” for instead of sons and daughters you have a place forever in heaven. Now the poor are blessed, now Lazarus is set before Dives in his purple. Now he who is weak is counted strong. But in those days the world was still unpeopled: accordingly, to pass over instances of childlessness meant only to serve as types, those only were considered happy who could boast of children. …

12. Having discussed marriage and continency he at length comes to virginity and says“Now concerning virgins I have no commandment of the Lord: but I give my judgement, as one that hath obtained mercy of the Lord to be faithful. I think therefore that this is good by reason of the present distress, namely, that it is good for a man to be as he is.” Here our opponent goes utterly wild with exultation: this is his strongest battering-ram with which he shakes the wall of virginity. “See,” says he, “the Apostle confesses that as regards virgins he has no commandment of the Lord, and he who had with authority laid down the law respecting husbands and wives, does not dare to command what the Lord has not enjoined. And rightly too. For what is enjoined is commanded, what is commanded must be done, and that which must be done implies punishment if it be not done. …