shall
This part of the Olivet discourse goes beyond the "sign" questions of the disciples (Matthew 24:3) and presents our Lord's return in three aspects:
(1) As testing profession, (Matthew 25:1-13).
(2) as testing service, (Matthew 25:14-30);
(3) as testing the Gentile nations, (Matthew 25:31-46).
virgins
The kingdom of heaven here is the sphere of profession, as in Matthew 13. All alike have lamps, but two facts fix the real status of the foolish virgins: They "took no oil," and the Lord said, "I know you not." Oil is the symbol of the Holy Spirit, and "If any man have not the spirit of Christ, he is none of his" (Romans 8:9).
Nor could the Lord say to any believer, however unspiritual, "I know you not."
heaven
( See Scofield) - (Matthew 3:2).