Tertullian

“ For what is absolutely good is not permitted, but needs no asking to make it lawful. Permission has its cause sometimes even in necessity. Finally, in this case, there is no volition on the part of him who permits marriage. ”

“ This (even) broader assertion we make: that even if the Paraclete had in this our day definitely prescribed a virginity or continence total and absolute, so as not to permit the heat of the flesh to foam itself down even in single marriage, even thus He would seem to be introducing nothing of “novelty;” seeing that the Lord Himself opens “the kingdoms of the heavens” to “eunuchs,” [1] as being Himself, withal, a virgin; to whom looking, the apostle also—himself too for this reason abstinent—gives the preference to continence. ”

“ Saving it, plainly, and we will see under what limitations; nevertheless already destroying it, in so far as he gives the preference to continence. “Good,” he says, “ (it is) for a man not to have contact with a woman.” It follows that it is evil to have contact with her; for nothing is contrary to good except evil. ”