What role does faith play in a sinner's plea for mercy?

In the context of a sinner's plea, faith acts as the means through which God's mercy is applied. As illustrated in the parable of the publican, genuine faith recognizes one's own depravity and looks to Christ for redemption. Hebrews 11 defines faith as the assurance of things hoped for, and this is particularly poignant for sinners seeking mercy. By placing faith in the completed work of Christ, believers can rest assured that they are forgiven and accepted by God, underscoring that salvation is entirely by grace through faith.