Originally Posted by lithium
That is flat out wrong.
Depression has nothing to do with your surroundings, what is going on in your life, recent events, anything. Depression is the result of chemicals in your brain not circulating and doing their job, therefore causing you to feel down with no cause, explanation or reason why. Real depression makes you feel like you're just not a fully functioning human being. Your ability to even think is greatly reduced simply because your brain is no longer working correctly. The depressed mood is merely one symptom.
Simply put, if you can just "snap out" of your depression by buying something new, going and getting drunk, getting laid, playing a new game, whatever, then you were not depressed.
It's been proven that cognitive therapy does cause a rewiring of the brain. It does help improve depression and retrain the brain to be normal again. So do drugs. "Quick fixes", however, do not. The real problem here is society's general ignoring of depression as a real illness and the general myth that people just need to "chipper up" is what often leads people who are truly depressed to kill themselves or others.