Depression is a prison where you are both the suffering prisoner and the cruel jailer:

This is the absolute definition of depression that you are in your own jail of depression.You are guilty of yourself. You are bound by yourself.No one can escape from this jail but yourself. Depression treatment is all about your willpower and firm determination.If you decide to break this jail of depression you can break it easily. But if you can not act upon your decision, depression will overcome you. It will catch you up and you can not flee from it. 

All medicines used for depression are just used to sleep your thoughts but not to stop depression. This is only you who can actually stop depression permanently,  can overcome it.

So when you realize that you have become a victim of this cruel disease gather up your courage and fight with it. One day you will get rid of this prison of depression.