One of the more important research discoveries in recent years has been that significant aspects of personality are inheritable. For those who frequently have hours or days of depression, anxiety or mood problems it is as important to recognize some part of our personality is with us for life just as it has been helpful for addicts to accept that alcoholism is a disease and it is now an ongoing part of personal health. This acceptance however, is not a sad and helpless resignation. It is acceptance that brings "serenity to accept the things I cannot change;courage to change the things I can...."
The dark moods and negative feelings in recovery from emotional problems was a well known problem for such persons as Abraham Lincoln. In January 1841, he came close to suicide as he had a serious attack of the "black dog" mood. He was known to have such depressive days and he had to learn how to continue to function in spite of such negative moods. Even acceptance that you are possessed by negativity may not bring relief. However, people such as Lincoln had to learn to deal with real human limitation and carry on anyway.
Even if you work your program well, you accept your limitations, and you stay sober and clean, you may wake up one morning and feel blue and think there is no reason to live. That Black Dog day is upon you. Get up anyway. Do what has worked anyway. Stay sober anyway. Pray anyway. You are in training today for all the days to come. This is your job. Fight the Black Dog. Live heroically even when it's hard.
Blessings and peace for you today.