Many Americans balk at the idea of setting aside an entire day for worship, rest, and time with those who matter most to them. In a culture of constant busyness, the lines have blurred between our work and personal lives, and we feel pulled in many directions. Yet we long for more time well spent—unrushed time to be alone, relax with friends and family, and grow closer to God. Many of us seem to have forgotten the ancient spiritual practice that can help us regain balance in our lives:...