This seems to be true only if your mental states of knowledge can have no effect on things that you care about... that is to say, it's pretty clearly false!

TRIGGER WARNING: If your brain works approximately like mine reading my link may literally make you physically uncomfortable for several minutes.

When looking into this, I found a meme which refers to pieces of information that your brain or body normally automatically takes care of for you, and that being reminded of it causes your consciousness to take manual control, which is disconcerting because you are distracted by dealing with the irrelevant information for a while, despite the fact that in general, this is handled automatically.

http://knowyourmeme.com/memes/you-are-now-breathing-manually

I'll admit I was aware of some of those, but some of them were entirely disconcertingly novel.