Believers are assured of being sealed by the Holy Spirit through their transformation and witness of the Spirit in their lives.
The assurance of the Holy Spirit sealing believers is confirmed through the profound transformational experience that occurs at regeneration. According to Romans 8:9, if anyone does not have the Spirit of Christ, he does not belong to Christ. Thus, the presence of the Holy Spirit within a believer is essential evidence of their status as a child of God. Furthermore, the sealing act involves not just external knowledge but an inward change where believers begin to resemble the image of God, characterized by holiness, love, and truth, ultimately leading them to live in accordance with God's will. This regenerative work is assured by God's covenant promises, of which the Holy Spirit serves as both the seal and the guarantee.
Commentary