Depression akin to Dementors

If someone were to ask me what depression is like, I would say Dementors as in the books and movies Harry Potter.  Rawlings herself was in depression when she wrote the books.  I think she characterized the disorder rightfully in the dark shadowy flying figures, sucking out all the joy from persons who came into contact with them.

"Dementors are among the foulest creatures that walk this earth. They infest the darkest, filthiest places, they glory in decay and despair, they drain peace, hope, and happiness out of the air around them... Get too near a Dementor and every good feeling, every happy memory will be sucked out of you. If it can, the Dementor will feed on you long enough to reduce you to something like itself...soulless and evil. You will be left with nothing but the worst experiences of your life."

—Remus Lupin to Harry Potter^[src]

And to rid oneself of "depression" or darkness, one needs to think happy positive thoughts to bring forth light  (casting the Patronus Charm) which diminishes the Dementors.

"A Patronus is a kind of positive force, and for the wizard who can conjure one, it works something like a shield, with the Dementor feeding on it, rather than him. In order for it to work, you need to think of a memory. Not just any memory, a very happy memory, a very powerful memory… Allow it to fill you up... lose yourself in it... then speak the incantation "Expecto Patronum"."

—Remus Lupin teaching Harry Potter the Patronus Charm^[src]

"Make it a powerful memory, the happiest you can remember. Allow it to fill you up… Just remember, your Patronus can only protect you as long as you stay focused… Think of the happiest thing you can."

—Harry Potter teaching the Patronus Charm to Dumbledore's Army^[src]

So I call upon the Divine energy to come and heal me.