Today in church, Deacon Craig gave a sermon on the 10 Virgins. He called them "Bridesmaids" instead of virgins, and the message was different than I'd ever heard before, and I loved it.
He told the story and then gave his opinion on what went wrong. He said that he felt it didn't have to do with being underprepared with oil, but with them not believing and trusting God. After all, Jesus was a God of miracles. Hadn't he turned water to wine? Fed over 5 thousand with just 5 loaves of bread and 2 fish? So when the virgins/bridesmaids worried that their oil wasn't sufficient, they went looking to buy more/provide their own oil.
Deacon Craig reminded us that their lamps' wicks were already trimmed and lit, they were just worried that what they had wouldn't be enough - they wouldn't be enough - so tried (on their own) to get more oil. We know what happened: they were late and the Master did not open the door to let them in - he said that he didn't know them. Who knows? Perhaps the lighting would have been so bright inside the banquet hall that they wouldn't have needed their lamps at all?