The Five Stages of Grief (Kübler-Ross)

1. Denial
2. Anger
3. Bargaining
4. Depression
5. Acceptance

You never really know how far you've fallen until you've reached the end of your climb out - where the air is fresh, where the heart is light, where the hope is renewed - and you look back at the darkness from where you came. 

And shudder, making an oath to oneself, "Never again."