We must conquer space in order to sanctify time. All week long we are called upon to sanctify life through employing things of space. On the Sabbath, it is given us to share in the holiness that is in the heart of time. Even when the soul is seared, even when no prayer can come out of our tightened throats, the clean, silent rest of the Sabbath leads us to a realm of endless peace, or to the beginning of an awareness of what eternity means. There are a few ideas in the world of thought which contain so much spiritual power as the idea of the Sabbath. Aeons hence, when of our many cherished theories only shreds will remain, that cosmic tapestry will continue to shine. Eternity utters a day.
~ from THE SABBATH by Abraham Joshua Heschel