i disagree. it is his fault that he is depressed. its a state of mind. clearly he is depressed about something. whatever "something" is, if you can change it, great, then you won't be depressed anymore since its changed. if you can't change it, then you have to change the way you feel/think about "something". otherwise, you'll be depressed, unhappy, <insert other description as you like>

i think he's doing it on purpose, or he has a weak mind. pick one.