The Parable of the Ten Virgins; Matthew Chapter 25

1. Ten virgins are in the story, to walk through the night---the evil time of the present---and they are going to meet their groom, Jesus.
2. The five wise and five foolish correspond to wise and foolish Christians. I do not believe the number has a significance, other than poetic effect. It is a literary technique, and I had been tempted to draw some sort of meaning from the number, but such is a baseless reading of scripture. Trying to find meaning in numerology is a form of bad method for reading the Bible. It can only bring specious interpretations.
3. As a young man, I used to forget my homework. I could have even done the homework assignment, but I might have left it at home and thereby not received the grade for it. It ought to be evident that I was a foolish man in youth, and the literal meaning of this is to outline foolishness. A very practical observation of foolishness, which is forgetfulness.
4. The wise, again, take their oil. They do not forget. Likely, the forgotten element which the wise virgins do not forget is the Moral Teaching of Christ. Christ likens the teachings he gives in Matthew 5 - 7 as a rock, on which to build your foundation. The wise virgins practice obedience to these commandments, thus their lamps are filled. The foolish, not practicing the moral commandments of scripture, their lamps run empty.
5. The Bridegroom tarries. This is the time of life, the span between birth and death. Jesus tarries between life and death, so that we suffer much, until we slumber. The sleep is a forgetful state. Maybe a loll in the rhythm of a Christian's life. The virgins are tired, they fall asleep waiting outside the door of the church to be married---what this sleep means is a mystery. It cannot be a disobedience, but it may actually mean our worldly lives and the comforts of life, which loll us into a sleep, of sort.
6 - 9. The day of death is upon us, or the tribulation. The Bridegroom is coming to take the virgins to heaven. The virgins are to go out and meet him. But, the foolish virgins have not the law of God with them, so they then ask the wise virgins for their oil. Of course, a man cannot borrow righteousness from another man, so the wise virgins remain vigilant, and tell the foolish virgins to go out into the world and buy their oil. By this, it must mean there is no longer any time to repent. The oil of the world will never suffice---or the oil of the world's wisdom. They must trim their lamps with the world's wisdom, rather than Christ's moral teachings.
10. While the foolish virgins were out, trying to buy their oil---while they were trying to accumulate the knowledge of salvation from the world---the wise virgins, who retained the law and moral teachings of Christ were at the door, ready to be taken home.
11 - 13. The virgins who were foolish then come to the door, after the door has shut behind the Groom and his Bride, and they cry out, "Let us in!" But, it is too late, the wedding has begun. Christ then says, "Watch, therefore, that you know neither the time nor the hour which Christ returns!"

Notes: The issue here, I see, is with modern evangelical Christians who believe that "Works" are apart from God's teachings. The entire teaching of modern evangelicals discounts the clear teaching of Jesus, that we are to add works to our faith. Grace means that a person who has committed sin, like myself, can be saved. Freely, all of my sin is forgiven, past, present and future. But, clearly, the foolish virgins are the ones who take this as an excuse to do what they please, and they forget the clear prescripts of Christ who taught plainly that works were a part of our faith. As, faith without works is dead.