Depression is not continous never ending for everyone. People have different experiences with it. It can vary in degree of duration and severity,lasting a week, few weeks or few months or go on for a lot longer, years. It is not predictable when it will occur or reappear. The way someone percieves, understands and deals with it is varied, no one particular set correct way. People can live a depression-free life, can overcome it, liberate self and transform. Some people have said that they have managed to.