I know some people who suffer from minor depression (keeping in mind what is the true definition of Depression is a very broad spectrum).
Knowing these people, you can pick the level of drop by the way they carry themselves, you watch them strap on an aeroplane and blast off.
They always seem to come back with a new spring in their step, a renewed vigour which is clear and evident.
Aviating appears to have the ability to do what medicine can't.