Tertullian, On the Veiling of Virgins 13

If you misuse the habit to impress people, then live up to it in this way too: veil your head among the Gentiles. In church you hide your virginity, which you conceal outside of church. You fear strangers; reverence your brothers as well. Or be consistent: dare to be seen as virgins in the streets just as you dare in the churches. I'll praise your mettle if you also peddle your virginity among the Gentiles. The same nature exists outside as inside; the same institution stands among men and before the Lord with the same freedom. So why do you hide your good outside, but broadcast it in church? I demand an answer: is it to please your brothers, or to please God Himself? If it's to please God: He is just as able to see what is done in secret as He is just to reward what is done for Him alone. Finally, He commands us not to broadcast the deeds that will earn a reward from Him, nor to settle for human praise instead. If we're forbidden to perform even a single act of charity with a guilty conscience, how much more must we shroud ourselves in darkness when we offer God so great an oblation—our own body and our own spirit—when we consecrate that very nature? Therefore, what cannot be seen as done for God, because God does not will it to be done that way, follows as done for the sake of men: certainly first it is unlawful, as it is lustful for glory. For glory is unlawful to those whose proof consists in all humility. And if the virtue of continence is conferred by God, why do you boast as if you had not received it? If you haven't received it, what do you have that was not given to you? But this very fact proves it was not given to you by God, because you do not present it to God alone. Let us see, then, what is human, whether it is firm and true.