A wise poet once said "the eyes are the window to the soul", and this is completely true. Within seconds at peering into the eyes, it's possible to see a glimpse into a person's soul.
It is with these glimpses that we can simply see the memories that have developed over their life. They can show the sadness or happiness one has possessed.
Memories are the supreme essence of the soul. Without them, we are nothing but a husk. But every memory is a unique transforming experience. Each memory molds our soul, and as a result, we are better for it.