Pessimists about moral testimony hold that there is something suboptimal about forming moral beliefs by deferring to another. This paper motivates an analogous claim about self-knowledge of the reason-responsive attitudes. When it comes to your own mind, it seems important to know things “from the inside”, in the first-personal way, rather than putting your trust in another. After motivating Pessimism, the paper offers an explanation of its truth. First-person knowledge is distinctive because it involves knowing a state of mind and (...) finding it intelligible from one’s point of view. It concludes by considering the value of this form of self-understanding. (shrink)