How do we know the righteousness of Christ is enough for salvation?

The assurance of salvation through the righteousness of Christ rests in the acknowledgment that human righteousness is utterly insufficient. As Scripture teaches, all have sinned and fall short of the glory of God (Romans 3:23). Therefore, only the perfect righteousness of Christ can fulfill the requirements for justification before a holy God. In Revelation 19:8, it is declared that the fine linen represents the righteousness of saints—this righteousness is not their own, but Christ's, granted to them by faith.

This gift of righteousness is foundational to the Reformed faith, emphasizing that salvation is by grace alone through faith alone (Ephesians 2:8-9). Believers are assured that they are ‘clothed’ in Christ's righteousness, which not only covers their sin but also makes them acceptable before God. In light of this truth, the believer's holiness grows not from their own works, but through their union with Christ, continually being transformed by the Spirit. Hence, our confidence in salvation rests on Christ's finished work and not on personal merit.