Because of depression you can see this world in black and white. and by optimiscism you can see the world with its beautiful brightful real colors. do not be the victim of your damn thoughts, find a hole in the middle of nowhere and burry it, don’t even try to get back to think of it over again, when it happens, make yourself busy with anything else. directly your mind will shift the way of your thinking quickly within seconds, you will gain good results If you try it. In brief, believe me It is easy to manipulate with your mind. you all need just a kind of determination.
The recipe is just to mix that step with determination and practice.
I wrote this from my own experience, please let me know, it works with you too.
Thanks for reading.