It is hard for some to keep things simple but I will do my best.  In my opinion the point of life is to live no matter how sufferable it seems.  I spend 14 years with PTSD, Chronic Depression, Non functional high anxiety and lots of shit I needed to talk about and to figure out.  My father was going to pass away I think it was 5 years now and after blow after blow between the age of 35-49 I have seen shit most people don't.  

I have stared at death's door and looked right into the eyes of my childhood friend hanging, one of many.  I don't like to keep count but probably more bodies than how many years you have been on this earth.

I am scared, afraid but fuck it.  I look at life like a ride and a game.  Do I still have these problems, yes.  I used medication and therapy for 14 years and finally turning age 50 in 6 months I know what I want in life, how to get it, how to deal with the downs which you cant come back from unless you hit rock bottom.  

You want to quit.  I understand.  I really do but you can get help if you want to live.  Find someone, anyone who can be your support partner.  A mentor, someone you can trust or turn to.  If you don't have anyone seek out group therapy.  We have 1 in my neighborhood for my whole city where you can come and talk land no one judges just listens and helps you overcome your demons.

It's going to be OK.  Just be.  That's all you need to do.  You are the narrator of your own life, if your depression is that heavy you cant see the real world.  Call 911, ask for help.  Please.  No one is out to get you and you deserve so much better and you can be better.  I promise, you don't need faith or permission, a thought is a thought, if you put an action to that thought then you could leave behind many people who cared for you or will down the road.  Someone might actually need you someday.

Keep fighting!