Why is understanding Christ as our Sabbath important for Christians?

In Matthew 12:8, Jesus states, 'For the Son of Man is Lord even of the Sabbath.' This declaration affirms that He embodies the rest that the Sabbath symbolizes. In historically Reformed theology, Christ's fulfillment of the law redefines the concept of rest for believers. Rather than adhering to rigid Sabbath laws, Christians find their rest in Christ, who completed the work necessary for salvation. He is the ultimate source of peace and the assurance that believers are accepted by God based on faith, not by their religious works. This underscores the doctrine of resting in Christ's accomplished work as the foundation for spiritual life, encouraging believers to approach God with confidence.