How do we know the concept of rest is important for Christians?

The concept of rest in Hebrews 4 asserts that there is a rest remaining for the people of God. This rest is not merely physical but spiritual—it's the assurance that our salvation is complete and that we cease from our own works, trusting fully in Christ's finished work on the cross. The Jewish celebration mentioned in Esther, where they rested after their victory, parallels the rest believers experience when they receive the gospel. In Christ, we find a deep and abiding rest from the burdens of sin and the law, providing us joy and peace that surpasses understanding. This rest is a foretaste of the eternal rest we will have in glory.