Time

Questions for you. What is time exactly? Does time truly exist? Does the marking of a physical passing of the sun really signify a passing of this concept named time? Or rather, is it just a change in energy manifest in the rotation of our solar system and planet respectively. You may say then, if there is no time, how is there a past and a future? What if a memory is not a distance in time into the past, but rather a point of progression of you. Our perception of time is a societal impression. What do we have that shows us or even describes time? We have memories. Memories of our own and descriptions from others. I propose that rather than a journey through this concept of time, what we really have is an expansion of energy of everything and a progression(also an expansion of energy) of people; consciousnesses, spirits, minds, whatever is the actuality of a person. We know that without expansion we have decay. If this applies to the universe, and as we are a part of it, why not to ourselves? Moving on (I notice I don't dwell very long on a single concept :\ Oh well.). So, we can perceive the present. What is the past and what is the future? What is the past to me are these memories, but what are they? It is a remembrance of what we have done and how we used to be, but does that mean there has been a passing of time? Or rather a progression or development of something or someone? Fun stuff. ;)