How do we know Christ's work is complete?

The assurance of Christ's complete work is found in His life, death, resurrection, and ascension. Ephesians 4:10 asserts that He ascended after descending, indicating that He completed the mission of salvation by fully identifying with humanity in His incarnation and then overcoming sin and death through His sacrifice and resurrection. The text highlights that 'nothing was left undone' in Christ's work.

Additionally, the completeness of His work assures believers that we are united with Him in His victory over sin and death. His ascension signifies His authority to grant gifts to His church and maintain unity among believers. Therefore, understanding Christ's completed work is not merely theological but practical for our faith, as it means we can approach God confidently and are considered complete in Him, not by our merit but by His grace.