What is the reflection on the parable of the ten virgins?

The strict application is Jewish and refers to when Christ comes "with His saints" to set up His Kingdom and punish the nations. The virgins are professing Jewish disciples. In the midst of the great Tribulation, the mid-night cry will be raised.

This can also be applied to Christians. The parable is a warning of the "Rapture" which precedes the "Revelation." The lamp is a type of God's Word and the oil of the Holy Spirit. The two classes distinguish between Possessors of Christianity and Professors of it.

Whichever application you prefer the message is the same: be ready!