Dear Nansings,
  Our doctrine is from Romans to Philemon.
The books after Philemon, were written to The Hebrews, NOT to the
Church. That is why its called "the letter to the Hebrews.!"
Nothing is these books applies to the church. The writer was telling
the Hebrews who had heard the truth, but then rejected Jesus and went
back to Judaism and The Law that they had no hope.
   As far as the five lost virgins, Imho, they still cannot be saved
Christians, as they never had the oil of the Holy Spirit.
Lewis