WolfishMusings
He’s saying (I believe) that depression is a physical/mental ailment and not a spiritual one.
There are 2 types of depression. One that is a mental condition due to some inborn mental imbalance, and a depression that comes from the way a person is living their life.
The depression that comes of living an unfulfilled life is a spiritual depression that requires a spiritual awakening inside the person.
A Rabbi and some mussar seforim can heal a spiritual depression.