"A person himself believes that all the other portraits are good likenesses except the one of himself"

Edvard Munch's quote, "A person himself believes that all the other portraits are good likenesses except the one of himself," delves into the mental complexities of self-perception and identity. At the heart of this statement lies the concept of subjective reality versus objective truth. Munch suggests that individuals often find it simple to recognize and appreciate the traits and qualities of others from an external point of view, while they have a hard time to see themselves with the very same clarity and neutrality. This disparity develops from the complex web of self-awareness, insecurities, and individual biases that color our perception of ourselves.

The quote also reflects the idea that self-perception is naturally flawed and biased. Individuals tend to be their own harshest critics, often stressing perceived imperfections or deviating from how they are seen by others. This internal self-doubt contrasts with the usually more accepting and forgiving lens through which others may see us and through which we see them. The battle here has to do with incorporating one's internal sense of identity with the external reflections offered by others.

Furthermore, Munch's quote highlights the principle of the "looking-glass self," which suggests that our self-image is formed mainly by how we think others view us. Yet, this interpretation can be altered by our predispositions and stress and anxieties, leading to a distortion in how we see our own similarity versus others. This detach can sustain a constant cycle of error and frustration.

In the more comprehensive context, this self-questioning can be seen as a universal human experience-- an artistic exploration of one's self that is not easily captured in art, simply as it is not easily fixed up in the psyche. The quote catches the essence of the human condition, where understanding ourselves completely stays elusive, driving home the poignant truth that self-awareness is a lifelong journey, spoiled by introspective predispositions and the ever-evolving building and construction of self-image.