Advent: Waiting for God

Scripture points us to another tension that we must live within. On the one hand, we long for the coming day of peace. On the other hand, we are called not to worry, not to be anxious, and not to live in the future. What does it mean to live without worrying when our hopes for the future are crushed? When it does not seem like these messianic promises have any hope of being fulfilled? When our hunger and thirst is left without satisfaction?