Sure. Although it is a vary leaky abstraction :)

We used to consider depression as a psychological phenomena. That is, we used to think that we could make a person think their way out of it. Either though CBT or some other kind of psychological treatment.

Since then we have learned that neurological factors, in particular neurochemistry which are correlated with depression. We now know a person cannot think their way out of depression - we have developed treatments with varying success, although we still have a way to go.