Q: Why do some folks get turned off by nostalgia?
A: Just as the future is an unknowable monstrosity, emerging in the mind as a Frankenstein-like creature, so too the past is a terrifying horror show. It is a series of gaps and lacunae that continuously denies us access. Viewing the past through the lens of nostalgia is like watching a beautiful park in a video—you will never be able to unearth the hidden nooks and crannies that are not directly visible. The past manages to be both static and fluid; though we cannot change our memories, we can never truly trust them since they are not directly experienced in the “present.” Indeed, how can you be sure that you were not created yesterday, full of implanted memories? Perhaps you are a cyborg, created with fond memories of listening to Dave Matthews Band with your friends on a beach.
To take a turn, we must also look at the benefits of forgetting. Indeed, humanity would be driven mad without our ingenious faculty for forgetfulness. Imagine picking up a beer and reliving your total experience of beer, beverages, wheat, and marketing. Our lives are premised on the act of erasure—we must selectively destroy experience as it happens in order to function. However, this erasure follows a social pattern, forming itself into the constructed field of “History.” Your current state of forgetting is constricted by Western logic—you are living another past, whether you are a cyborg or not.
Nostalgia is destroying your ability to function in a truly radical fashion; give yourself a blunt head trauma in order to form an anarcho-consciousness, unfettered by the “past.”
(Courtesy of Yahoo!Answers)