How do we know that invoking the Lord brings salvation?

The assurance of salvation when invoking the Lord comes from Romans 10:13, which articulates, 'Everyone who calls on the name of the Lord will be saved.' This promise underlines the significance of faith in Jesus as both Lord and Savior. The condition of calling upon the Lord indicates a heart that recognizes its lost state and its need for divine mercy. Thus, salvation is not merely about vocalizing a prayer but stems from a genuine belief in Christ's power to save, highlighting His abundant mercy and grace that enable us to approach Him.