What does it mean to have oil in our vessels?

In the context of the parable of the ten virgins, the oil in the vessels represents the Holy Spirit and the grace necessary for genuine faith. The wise virgins, who took extra oil with them, symbolize believers who are filled with the Spirit and prepared for Christ’s second coming. In contrast, the foolish virgins represent those who may have an outward appearance of faith but lack the true indwelling of the Holy Spirit. Romans 8:9 emphasizes that 'if any man have not the Spirit of Christ, he is none of his.' Thus, the presence of oil signifies being born again, having a relationship with Christ, and being sustained by His grace.