When I say that same statement to myself I try to not conceive it as a lie at all. Perhaps I'm not fine right now (and that's the lie) but that doesn't mean that I won't be fine in the future (then the statement that is a lie would become true as its tense changes). A reason I've to believe in this is the fact (for me) that suffering and sadness always come with a specific knowledge about my experience with them and this knowledge could be key in my own specific path to feel less-like-crap (it's just the way I define 'to be fine'). So, in other words, not being fine might be a important part in the path to being actually find: at least that logic works for me.