However, Jesus explains: “The foolish took their lamps but took no oil with them, whereas the discreet took oil in their receptacles with their lamps.

The condemnation of the foolish virgins is for their not having oil for their receptacles. Jesus explains how the virgins awaken before the bridegroom arrives:

“Right in the middle of the night there arose a cry, ‘Here is the bridegroom! Be on your way out to meet him.’ Then all those virgins rose and put their lamps in order. The foolish said to the discreet, ‘Give us some of your oil, because our lamps are about to go out.’ The discreet answered with the words, ‘Perhaps there may not be quite enough for us and you. Be on your way, instead, to those who sell it and buy for yourselves.’”

The oil symbolizes that which keeps true Christians shining as illuminators, namely, the inspired Word of God, on which they keep a tight grip, together with the holy spirit, which helps in understanding that Word. The spiritual oil enables the discreet virgins to shed forth light in welcoming the bridegroom during the procession to the marriage feast. But the foolish virgin class do not have in themselves, in their receptacles, the needed spiritual oil.