We remember what makes an impression of us.
When you meet someone for the first time, even briefly, perhaps just a glimpse, the sound of a voice, the smell, if the impression left is strong enough, it will be remembered in perfect detail.
I remember a woman I saw in a busy train station in Inner Mongolia thirty-five years ago. I never spoke with her. I just saw her amongst hundreds of others I do not remember. Our eyes met, our destinies, in that instant, collided. I will never forget her. To this day, I could describe every detail about her in words, or or canvas.
This happens all the time to me. It happens, because I not not only look, but see.
Even more indelible than sight memories are scent, taste, and touch memories.