When you get depressed for no reason. Start having suicidal thoughts even when everything is going on great for you... You will understand exactly how it feeels and will never wish to get close to that dark feeling.
I experienced Postnatal depression with my first. And it was so mild ooh,I hear other mothers had it worse, I know how I felt. Depression is not something to joke about,neither is it soemthing to take pride in.Or a big name to threaten people with.
My heart goes out to people suffering from this disease,Peace will definitely find you.
Seek medical attention if you always feel like taking your own life. Go to teaching hospitals if you have very dark and sudden mood swings.. Medications are there for you. Affordable too.