3 But if it be good to abstain from the unlawful excitements of the senses, and on that account every Christian soul has gotten the name of virgin; why are five admitted and five rejected? They are both virgins, and yet are rejected. It is not enough that they are virgins; and that they have lamps. They are virgins, by reason of abstinence from unlawful indulgence of the senses; they have lamps, by reason of good works. Of which good works the Lord says, “Let your works shine before men, that they may see your good works, and glorify your Father which is in heaven.” Again He says to His disciples, “Let your loins be girded and your lamps burning.” In the “girded loins” is virginity; in the “burning lamps” good works.
Source: Sermons on Selected Lessons of the New Testament (New Advent)