How do we know Christ is our rest?

In Isaiah 30:15, the Lord emphasizes that in returning and rest, we shall be saved. This rest refers to Christ, who is our salvation and strength. Our hope lies in Him alone, as He offers complete security and freedom from the burdens of trying to achieve righteousness through the law. The scriptures point out that while the law reveals our sin and incapacity, Christ’s work justifies and sanctifies us completely (Romans 3:25-26). In Ephesians 1:4, we see that our acceptance before God is based on His grace, not on our merit, further affirming that Christ is the source of our salvation and ultimate rest.