But human memories change each time they are recalled, Jon. This is known as memory reconsolidation. It’s part of a natural updating mechanism that imbues even old memories with current information as you recall them. Thus, human memory does not so much record the past as hold knowledge likely to be useful in the future. That’s why forgetting is a human’s default state. By contrast, remembering requires a complex cascade of chemistry. Were I to increase the concentration of protein kinase C at your synapses, your memory retention would double.

Recall of memory is a creative process. What the brain stores is... only a core memory. Upon recall, this memory is then elaborated upon and reconstructed, with subtractions, additions, elaborations, and distortions.

Memory is more of a self-serving dynamic revision machine: you remember the last time you remembered the event, and without realizing it, change the story at every subsequent remembrance.

Memory is merely the process of tuning into vibrations that have been left behind in space and time.

But human memory resembles a late-night reveller who has had a few too many drinks: hard as it tries, it just cannot follow a straight line. It staggers through a maze of inversions, often moving in dizzying zigzags, immune to reason and liable to collapse altogether.

Memory is a reenactment of perception, indistinguishable from the original act of knowing.

When you draw on a memory, you always do so from the perspective of your present self. Psychologists call memory a “reconstruction,” because it is always reconstructed based on your present views, which influence how you see and perceive past events.14,15,16 As Oliver Wendell Holmes, Jr., stated, “A mind that is stretched by a new experience can never go back to its old dimensions.

Memory cannot be understood, either, without a mathematical approach. The fundamental given is the ratio between the amount of time in the lived life and the amount of time from that life that is stored in memory. No one has ever tried to calculate this ratio, and in fact there exists no technique for doing so; yet without much risk of error I could assume that the memory retains no more than a millionth, a hundred-millionth, in short an utterly infinitesimal bit of the lived life. That fact too is part of the essence of man. If someone could retain in his memory everything he had experienced, if he could at any time call up any fragment of his past, he would be nothing like human beings: neither his loves nor his friendships nor his angers nor his capacity to forgive or avenge would resemble ours.

We will never cease our critique of those persons who distort the past, rewrite it, falsify it, who exaggerate the importance of one event and fail to mention some other; such a critique is proper (it cannot fail to be), but it doesn't count for much unless a more basic critique precedes it: a critique of human memory as such. For after all, what can memory actually do, the poor thing? It is only capable of retaining a paltry little scrap of the past, and no one knows why just this scrap and not some other one, since in each of us the choice occurs mysteriously, outside our will or our interests. We won't understand a thing about human life if we persist in avoiding the most obvious fact: that a reality no longer is what it was when it was; it cannot be reconstructed.

Memory fades, memory adjusts, memory conforms to what we think we remember.

We will never cease our critique of those persons who distort the past, rewrite it, falsify it, who exaggerate the importance of one event and fail to mention some other; such a critique is proper (it cannot fail to be), but it doesn't count for much unless a more basic critique precedes it: a critique of human memory as such. For after all, what can memory actually do, the poor thing? It is only capable of retaining a paltry little scrap of the past, and no one knows why just this scrap and not some other one, since in each of us the choice occurs mysteriously, outside our will or our interests. We won't understand a thing about human life if we persist in avoiding the most obvious fact: that a reality no longer is what it was when it was; it cannot be reconstructed. Even the most voluminous archives cannot help.

our body has a memory of all time

Memory is the 'filling cabinet' of the brain wherein is stored all thought impulses, all conscious experiences, and all sensations which reach the brain through the five physical senses.

Memory, instead of being a duplicate, always present before one's eyes, of the various events of one's life, is rather a void from which at odd moments a chance resemblance enables ones to resuscitate dead recollections, but even then, there are innumerable little details which have not fallen into that potential reservoir of memory, and which will remain for ever unverifiable.

Memory is a stopgap for humans, for whom time flies and what is passed is passed.