I was talking to a young woman the other day, she's been sober about 4months.
She said she was feeling a bit of stress and didn't know how to handle some of the stuff that was coming up in her life. I explained that all the years she had been using and drinking was like missing class in school, and the stress she was feeling was like the test at the end of the lesson.
When we skip the lessons life is trying to teach us by being high the tests are a lot harder. By staying sober, we get to go "back to school" and pick up what we missed.