Do you ever have thoughts like, 'It's ok to take breaks, but I don't believe it's ok to take breaks'? Or, 'Nobody will think less of me if my writing isn't great, but I don't believe nobody will think less of me if my writing isn't great'? If so, what on earth can you do about it? There's no point telling yourself that what you believe isn't true - you already know that. If your mental life is this sort of hot mess, then maybe there's no hope for you. You may as well give it up, go to bed, and wait for the next series of Tiger King to drop.
Except, not so fast. Dig down a bit and you'll find that your limiting beliefs about yourself are not as crazy as they seem. They're probably not even beliefs at all. They're feelings, and there's plenty you can do about them. Let The Academic Imperfectionist point you in the right direction, with a little help from those renowned self-help gurus, G. E. Moore, Ludwig Wittgenstein, and David Hume.