How do we know that salvation is through the blood of the Lamb?

The foundation of salvation in the Christian faith lies in the sacrificial death of Jesus Christ, as articulated in Revelation 7:14, where it states that those in heaven have 'washed their robes and made them white in the blood of the Lamb.' This underscores the necessity of Christ's atoning sacrifice for redemption. Ephesians 2:8-9 emphasizes that salvation is a gift of grace through faith, not of ourselves, reinforcing that it is solely through Christ's work that believers are redeemed. It is through faith in Him and His blood that we are justified before God, ensuring eternal life.