I think the darkest involuntary thoughts I have are the ones where I visualise some form of suicide and then want to go through with it. It can happen at any time - when I'm waiting for the bus, taking my dog for a walk to the beach, walking by the numerous cliffs in my town. The thought comes out of nowhere and interrupts all that I'm doing. The thing is, I don't want to commit suicide, I don't want any harm to come to me. But in those varied periods of time after the thought materialises, I do. It really scares me. It doesn't seem like I'm really there, that some other sick, warped entity is there instead.
It's this disconnect that is the key, I guess. I recognise and take full responsibility over my mental health. If I can continue to see this illness as part of me but not my entire being, then I can continue working towards bettering my mental health and reclaiming my right to live.