How do we know salvation in Christ is sufficient?

The sufficiency of salvation in Christ is grounded in His complete work on the cross, where He atoned for the sins of His people. He is the only one who can fulfill the righteous demands of God's law, providing a perfect righteousness that believers can cling to. This assurance is further supported by the transformative work of the Holy Spirit, who brings a deep conviction of sin and reveals the unmatchable grace found in Christ. Believers are invited to rest in Him alone, knowing that He has triumphed over sin and death. Scripture passages such as Ephesians 2:8-9 illustrate that salvation is a gift from God, not by works but by faith in Christ alone.