As classified, depression is a psychological disorder or an unstable emotional state. I personally don’t agree with that classification. My philosophical point of view of disagreement is that when people are depressed, they are highly expected to isolate themselves from social interactions -or decrease it- and emphasize on their spiritual connection with God. They start to contemplate, examine divine phenomenas, analyze the daily routine from unfamiliar aspects and provoke already known knowledge.
Given that my thought is over the table, neccesserily, I must support it; Spiritually, in Christianity and Islam, individuals who are possessed by demons are usually considered in a state of depression -my point does not circulate the idea that depression can be categorized as a fortunate emotional disorder-. Depression being related to possession only serves my bigger picture which is that the illness opens a window to the external world.
Usually when a human being is depressed, he would more likely start to ask questions internally which has never been thought of before, such as: what is the purpose of my life? Why am I here, not there? Why did God choose this for me? How do I communicate with God?
I personally believe that opening that percise window to the external world supports the soul to escalate in spiritual knowledge where ordinary people cannot obtain. Helps you question matters, and communicate with your soul in a language that was not easily comprehended before.