2 In the first place, therefore, dearest brother, both by overseers and people nothing is to be more eagerly sought after, than that we who fear God should keep the divine precepts with every observation of discipline, and should not suffer our brethren to stray, and to live according to their own fancy and lust; but that we should faithfully consult for the life of each one, and not stiffer virgins to dwell with men,— I do not say to sleep together, but to live together — since both their weak sex and their age, still critical, ought to be bridled in all things and ruled by us, lest an occasion should be given to the devil who ensnares us, and desires to rage over us, to hurt them, since the apostle also says, “Do not give place to the devil.” The ship is watchfully to be delivered from perilous places, that it may not be broken among the rocks and cliffs; the baggage must swiftly be taken out of the fire, before it is burnt up by the flames reaching it.
No one who is near to danger is long safe, nor will the servant of God be able to escape the devil if he has entangled himself in the devil's nets. We must interfere at once with such as these, that they may be separated while yet they can be separated in innocence; because by and by they will not be able to be separated by our interference, after they have become joined together by a very guilty conscience. Moreover, what a number of serious mischiefs we see to have arisen hence; and what a multitude of virgins we behold corrupted by unlawful and dangerous conjunctions of this kind, to our great grief of mind!
But if they have faithfully dedicated themselves to Christ, let them persevere in modesty and chastity, without incurring any evil report, and so in courage and steadiness await the reward of virginity. But if they are unwilling or unable to persevere, it is better that they should marry, than that by their crimes they should fall into the fire. Certainly let them not cause a scandal to the brethren or sisters, since it is written, “If meat cause my brother to offend, I will eat no flesh while the world stands, lest I make my brother to offend.”
Source: The Epistles of Cyprian (New Advent)