Our self-aggrandizing tendency to view ourselves with respect to our best days and others according to their worst moments is self-serving bias taken to an extreme. It is frequently employed because their cognitive dissonance needs prevent them from thinking rationally. Cognitive Dissonance also comes into play when we judge ourselves by our intentions, irrespective of our actions, and others by their actions, irrespective of their intentions. This helps us justify judging others in their weakest moments while we lord our best moments over others.
