Theory of special relativity explains how relative positions of observers can often lead to contradicting perceptions. For example, two actors who are in different inertial frames can both claim to be in a state of rest, or they both can observe that the clock possessed by the other one is running slower, or dispute the length of the stick they are carrying. The vantage point matters, but thankfully with physics we have an explanatory scheme, once we prove the consequences of space and time in special relativity we can appease both the actors.
Depending on the mental state of an observer his perspective about a drunk destitute can vary from absolute empathy to an outright contempt, to a certain degree even this perception is transient. Our emotions are also relative to some reference point, try describing happiness in absolute sense, actually a sub-saharan African nomad might just be more contented than a wall-street banker. Recently I watched a documentary which claimed the slum dwellers of Kolkata are on an average happier than the residents of the United States. Ignorance can be bliss, but it’s irrelevant because no matter how attractive this happiness may sound not many Americans will trade their suburbs for an Indian slum residence. Similarly, ranking emotive responses of various individuals after disregarding their relative mental benchmark is quite meaningless.
“We are studying mental and not physical events, and much that we believe to know about the external world is, in fact, knowledge about ourselves” – F.A.Hayek
In “Human Action” Ludwig von Mises elaborates on the epistemological problems of historical interpretations, and rightly so, because no matter how unbiased a writer might be his narrative has to be from a vantage point determined by the particular facts he had prioritized and picked for analysis. We can logically classify information as relevant only based on our relative experience and exposure to various coherent abstract patterns. For example, a person unaware of a right-angled triangle can never classify the structure nor derive its Pythagorean properties, for him it might be just another triangle. Our comprehension is indeed relative to the recognizable abstract structures developed in our mind, rest becomes incomprehensible jitters. Why do you think every time you reread a book or go back and listen to your favorite song you discover something novel?