The Dispensations  are required to properly understand scripture.
In the parable of the ten virgins, if these were the church, then half
the church would loose their salvation... Which cannot happen.
    There are four groups in heaven in eternity. The old testament
saints,,, the church,,, the tribulation saints,,,and the millenial
saints...
    At the rapture, Jesus comes for His bride the church...  The old
testament saints are  the guests at the wedding, and are also the five
righteous virgins... the five virgins with no oil (meaning the Holy
Spirit) would be the religious Jews (and a few gentiles) of the old
testament who did not know God, but just did religious things...