The Parable of the 10 virgins that our Lord told in Matthew 25 is broad and not very well defined, and so, can have several interpretations. One can think of the girls representing believers and unbelievers when the Lord, as the bridegroom arrives as the second coming, or may be even as Jews who accept and don't accept the Lord at His first coming. It is not easy There are problems of logic and truth at each turn. I think we are on thin ice when we make the oil in the lamp the HS. After all, how can I carry a store or buy more of Him? Are the girls who go in really the ones who are saved and the others not? If so, then it sounds like salvation by works to me! What I can do to be saved, such as be properly prepared?
The best interpretation I can put on it, and I think the Lord's hearers may very well have taken it that way, is that this is guidance and a warning to those who believe. Guidance and a warning for you and for me. We are given a task, we have access to the materials and we have time. All are under the control of the Lord Jesus Christ. There is no doubt who is in control. It is his wedding and he is the kingpin. Nothing starts before He is ready and in His presence.
All the girls are given a task to do; the same task. I must use my time and opportunities properly so that I am ready and behaving as the Lord requires to be able to participate in the task. Successful participation means that
1.my contribution to the ministry is accepted and so am a I. I can't just go on doing things, even if they are those of God, my way. If I do, there is going to be a problem! This is not about salvation, but participation in ministry.
2.If I am found prepared and present, then I will be swept in in the wonder of the Lord's presence and participation in far more than just my contribution makes.
3.If I am accepted or 'known' in ministry, then I will participate and enjoy the warmth, celebration and joy of the outcome of the ministry with the Lord Jesus. Ministry is not the end itself, just as welcoming with light wasn't the end of their task.
The Groom's response is harsh, yes! But God doesn't compromise with our dilly-dallying, lack of commitment and mucking about in ministry. In terms of our task in a ministry, either He accepts our contribution and us, or neither. We can't muddle through or do it our way. I must remember I am dealing with almighty God, the one with all authority.