One day the skies fill with thick clouds, obscuring your vision of the future, keeping you trapped in the here and now, in a place you don't want to be.
The next (or perhaps the day after the next day), those clouds disappear. The sun emerges and the serenity, the fulfillment and bliss of life, once more settles comfortably around your shoulders. You breathe a sigh of relief, for you were waiting to exhale (even though you never did like that movie) and your patience has been rewarded.
The joy has returned. Perhaps it's the cooler temps, the promise of autumn right around the corner, the burst of creativity in the novel, or the simple state of being alive, but the depression has fled into its dark corner.
Make no mistake, it will return. But thank the Lord it decided to only stay a short while this time, not even long enough to unpack a suitcase before happiness reappeared and kicked it's sorry behind to the curb.
On Sunday night, you were thinking, "It will get better." Today, you think, "It is better."