The paradox of Advent is that even in the darkness, there is a light. Even in our brokenness, there is healing. Even in our weariness, there is rest. The Advent promise is that the gift of God comes to offer light in the midst of our weary world.
George Bailey was struggling with failed plans and great pain, and he found himself on the brink of giving in to the darkness. Nevertheless, God showed him the hope of new life.