Think about a time that you were overly critical with yourself. You looked in the mirror and didn’t like what you saw. You told yourself you were too skinny or too fat or even too average.
You picked apart the image looking back at you. Or you forgot something important, or made a mistake and you told yourself you were stupid or incompetent.
Research demonstrates that our brains have a negativity bias, meaning we are more sensitive to negative than positive. This is because in the natural environment, negative signals were a sign of trouble and therefore took up more of our awareness.