When I'm in that state of mind I try to ask myself what else there is? What alternative is there for me to be alive? Being dead and experiencing nothing? That's not really an alternative, that's just nothing.
So I persuade myself to stay alive, see what happens, experience something rather than nothing. And I know it sounds easier than it is and I do doubt it myself at times. But again, I don't feel there's an alternative. The only alternative to feeling shitty and sad is to pursue happiness, not death.
So either I have to pull myself out of the pit, find out what I want and pursue it, be happy where I am and accept it for the time being, or give in and forget all choices and possibilities. The last one is really not an option for me.
I know this sounds pretentious but somehow I'd rather feel something than nothing even if that is feeling bad. I stopped taking meds because they made me feel hollow inside. Like nothing mattered. And I'd rather feel the ups and downs than feel this numbing indifference towards everyone and everything.
I love watching animals because I tell myself they don't have those kind of thoughts. They just are. Pure in-the-moment being. Sometimes I wish I could be the same.