From my understanding of this parable, and I’m not negating what was already said, we are to be watching, waiting and ready by still be filled with the spirit. Now, I didn’t reread it again—this was just my understanding. The oil signifies the Holy Spirit. We need to stay filled with the spirit as it instructs in Eph. 5:18. (Read 17-19) Also, this blends in with another parable in which a man was thrown out of the wedding because he was not properly dressed in white. The white robe also signified the Holy Spirit. We don’t go to heaven without the Holy Spirit.