At breakfast I could see the morning mist rolling in. It was like a soft grey blanket, covering my world. As I walked to the station, it slowly dissolved, leaving space for a shining summer morning. By the time my train left, a bright new day had begun.
An emotion can be like that: rolling in over you, chilling you off in to the bones and leaving you to see nothing but greyness. When in the midst of it, you might despair; it feels so all-encompassing, so hopelessly dense.
Then it's good to remember: nothing remains the same. Everything eventually dissolves, like morning mist.
You will be shining again.