Aura
Life is somehow divided into epochs with fuzzy boundaries and their own aura. Epochs arise and fade away unnoticed, but when I later come across a picture, a song, a taste, a smell, or any feeling from that time, its unique aura arises and evokes a kind of nostalgy. I wonder what defines an epoch. The time of the year, the weather, the mix of feelings in my mind, the people around me. All of it together somehow stands for that time. The aura is a sort of hash value of a given moment. It is the key to travel back to an epoch and feel again how it was to be alive at that instant. Hence the obsession to take pictures and videos of every single moment, wanting to take with us to the future what we cannot. I do that as well. Thousands and thousands of records of everything to cling to past moments that shall not be lost in time. Yet the mind is lossy and no amount of redundant backups can prevent all of it to be gone at some point. Forever and ever.
If a memory shall last for eternity, make it out of stone, not out of bits and bytes