What does the parable of the ten virgins teach about salvation?

The ten virgins symbolize the professing Church, where the wise represent those who are truly saved and have faith in Christ, while the foolish are those who rely on their own righteousness or false assurances. The difference lies in the oil, symbolizing the Holy Spirit and genuine faith that brings about regeneration. Scripture asserts that only faith in Christ makes one wise unto salvation (2 Timothy 3:15), and thus, the parable serves as a reminder that reliance on Christ alone is critical for eternal security.