Depression is nature and unescapable, you just have to bare it and build endurance to lower the threshold of the stimulus that trigger it. It needs to be running simultaneously with your other natural brain activities.

In 2011, I found a job of my dreams, but it ended in 2012, since then I began to took jobs that I'm not comfortable and I do not like just to provide for my family, it was hard and sad, and it lasted from 2012 to 2016. Now I'm happy I have a new job that I'm very comfortable with.

Depression is not new to me, I've experienced it since childhood, teenage period and throughout college. There's no OFF switch for it, the only way to turn it off is build strength and endurance for it, sooner or later it it will attack again, but it would be too weak to affect you.