How do we know that the Holy Spirit's work is effective?

The work of the Holy Spirit is an invincible and irresistible force that leads to the new birth and the granting of faith and repentance. This effectual calling is grounded in Christ's finished work on the cross, as highlighted throughout the New Testament. Romans 8:10 emphasizes that while the body is dead because of sin, the spirit is life because of righteousness. The Holy Spirit draws the elect to an understanding of their need for Christ and brings them to faith, effectively applying the merits of Jesus' righteousness to them, which cannot be resisted.