Jesus says to us, Come unto Me, all you who labor and are heavy laden, and I will give you rest (Matthew 11:28). The word Sabbath means rest. It was a day of rest under the Old Testament. It is fulfilled in Christ through the New Testament. Our Sabbath rest in Christ is completely depending upon Him.
Rest in Christ our Sabbath through God's grace. It's about what God has done for you in Christ alone. It's what God is doing in you and through you. That's called grace, and its fullness is found in Jesus Christ your Lord (John 1:16).
Rest in Christ our Sabbath by faith alone. That means your confidence, trust, and reliance is in His ability to do in your life what you are unable to do by yourself. Only God in Christ can save You. That means you rest in Christ. You rest in God's love, mercy, and grace, believing on the Lord Jesus Christ (Acts 16:30-31).
Works may boast and say, "I can get you to heaven, if you try hard and work to do your best." Christ our Sabbath is the gift of God to be received. We don't work to earn a gift. It is freely received. For by grace you have been saved through faith, and that not of yourselves; it is the gift of God, not of works, lest anyone should boast (Ephesians 2:8-9). It's not of works, but your faith resting in the finished work of Christ alone. Christ is our Sabbath.