When we come to the place where we can joyously “do no work” (Lev.23:3), it will be because God is so exalted in our mind and body that we can trust him with our life and our world, and we can take our hands off them.
Rest is one primary condition of Sabbath in the body. If we really intend to submit our body as a living sacrifice to God, our first step may be to start getting enough sleep. Sleep is a good indicator of how thoroughly we trust in God.
-Dallas Willard & Don Simpson