How do we know the work of the Holy Spirit is vital for salvation?

The work of the Holy Spirit is crucial in the salvation narrative. In the sermon, it is explained that the Holy Spirit comes to convince sinners of their sin and illuminates the truth of the gospel. It is the Spirit who actively engages in the hearts of men, bringing about recognition of their unworthiness and the need for salvation through Christ. Without the Holy Spirit’s intervention, sinners would remain in their natural state, unable to perceive their need for a Savior. The Spirit also keeps believers steadfast in faith, affirming that it is God’s grace that leads to faith, rather than any self-generated belief or action.