How do we know the Holy Spirit is important for salvation?

The Holy Spirit's ministry is indispensable in the process of salvation. He actively calls sinners to come to Christ, as seen in Revelation 22:17, where the Spirit and the Bride invite those who are thirsty to partake of the water of life. Paul reminds us that faith comes by hearing, emphasizing the Holy Spirit's role in producing spiritual hearing (Romans 10:17). Furthermore, without the Holy Spirit, one cannot acknowledge Christ as Lord, underscoring His centrality in empowering faith and repentance.