How do we know Christ's work of salvation is complete?

Christ's declaration 'It is finished' as He hung on the cross encapsulates the reality that His work of salvation was fully accomplished. This statement is foundational for understanding the nature of our salvation; it indicates that no additional work is required for our redemption. The rest that God exemplified in His creation parallels the rest we now enjoy through Christ, as He achieved complete atonement for our sins. Rather than adhering to the law or rituals of the Old Testament, we are called to remember Christ's sacrifice through the observance of the Lord's Supper, which symbolizes this completed work. Thus, our assurance rests on the finished work of Christ alone, confirming our salvation as complete before God.