They that were foolish took their lamps, and took no oil with them:
All Commentaries on Matthew 25:3 Go To Matthew 25
Augustine of Hippo
AD 430
But if it is good to abstain from the unlawful excitements of the senses, and on that account every Christian soul has received the name of virgin, why then are five admitted and five rejected? They are both virgins, and yet half are rejected. It is not enough that they are virgins but that they also have lamps. They are virgins by reason of abstinence from unlawful indulgence of the senses. But they have lamps by reason of good works. Of these good works the Lord says, “Let your works shine before men, that they may see your good works and glorify your Father who is in heaven.” Again he said to his disciples, “Let your loins be girded and your lamps burning.” In the “girded loins” is virginity. In the “burning lamps” is good works.