Every time we turn to Christ in faith it is like a moment of Sabbath, a little foretaste of eternal rest and glory. The gift of that moment lies not in what we do but what we receive. It is the holy time set aside to receive the greatest gift of God ever has to give, which is himself, in his own beloved Son.
At least one indication of unbelief is the tendency to measure life's challenges against our own adequacy instead of God's promises. To enter our Sabbath rest, we must put an end to self-reliance - trusting in our own abilities to overcome difficulties, rise above challenges, escape tragedies, or achieve personal greatness.