Our subjective awareness arises out of our dominant left hemisphere’s unrelenting quest to explain these bits and pieces that have popped into consci… - Michael S. Gazzaniga

This incessant interplay between cognition and feelings, which is to say between cortical and subcortical modules, produces what we call consciousness.

There obviously is a different feel to a wave of intense emotion versus an abstract thought, but each conscious form is an experience that gives us a unique perception of reality. The pattern in which these various conscious forms come in and out of awareness gives us our own personal life story. The vast variety of conscious forms and the ubiquity of consciousness in the brain are best explained by a modular architecture of the brain. The conceptual challenge now is to understand how hundreds, if not thousands, of modules, embedded in a layered architecture — each layer of which can produce a form of consciousness — give us a single, unified life experience at any given moment that seems to flow flawlessly into the next across time.

The first visit involves the challenge of the unknown, curiosity, adventure, often youth, and sometimes adrenaline. On a revisit, you are returning older, with more life experience under your belt, to familiar territory; it is not so challenging, your curiosity is not so piqued, you know more or less what to expect, you have less adrenaline pumping. You feel different, not necessarily worse or better, just different. This is true not just for returning to locales but also for trying to recapture any past experience.