What is the role of the Holy Spirit in the covenant of grace?

In the framework of the covenant of grace, the Holy Spirit acts as God's appointed agent to carry out the divine promise of salvation. As per John 14:26, He teaches believers all things needed for their walk of faith. His work includes bringing conviction of sin (John 16:8), revealing the Gospel to sinners, and conforming them into the image of Christ through sanctification. By empowering believers, the Spirit ensures that the covenant's promises are actively realized in their lives, leading to spiritual growth and holiness.