One thing I have come to understand in the past months is that depression drastically warps our outlook on life.
It is as though you are looking at life through a kaleidoscope, the only difference being that while a kaleidoscope turns light into beautiful mosaic like patterns, depression makes light look dark, colours look grey and the most beautiful of things look, at best, ordinary. Depression warps one's perception of the world around us: Filtering out the good, positive, life affirming things so that what we are left with is a hopeless cavity into which all things are drawn and warped to appear negative, hence compounding our view that there is really no reason for us to live at all. Whatever we have previously enjoyed, believed in or relished is sucked from our world; we lose, in essence, the ability to derive pleasure from anything or to hold on to any hope that life will be good again.
And regardless of how well my head knows the fact that it is the depression taking away my will to live, it doesn't change the fact that I CAN'T see the point to life. I can't tell the depression to leave my head, simply because I have recognised the cause of my despair. The fact of the matter is, depressed people still FEEL the despair, the loneliness, the hopelessness, the futility, the sadness, the frustration, the impulse to hurt and even kill themselves, the emptiness and so much more. Regardless of what causes these emotions, they are very much present and dominant in the lives of so many people. Depression warps everything good in the lives of its sufferers into something unbearable. And that's hard to live through.