How do we know the work of Christ is applied to our hearts?

The application of Christ's redemptive work to the hearts of believers is a fundamental aspect of the gospel. The Holy Spirit plays a crucial role in this process, illuminating our understanding and granting us faith to accept the truth of the gospel. As we behold the glory of God in Christ, we see the promises fulfilled in our lives, demonstrating that He does a work in us, not merely for us. This inward transformation is essential to the Reformed understanding of salvation: it is entirely of grace, highlighting God's sovereignty and the efficacy of Christ’s sacrificial death.