How do we know faith in Christ is the way to heaven?

Revelation 7:14 indicates that those in heaven have washed their robes and made them white in the blood of the Lamb, signifying the essential role of faith in Christ for salvation. Every believer's entrance to heaven is not based on their suffering or deeds but on the sacrificial work of Jesus. Salvation belongs to God alone and is entirely a result of divine grace. The faith that each believer possesses is a gift from God, affirming that no one can come to Christ without the Holy Spirit's work in their hearts.