They departed after displaying the splendor of eternal beauty, leaving behind the memory of an unforgettable event.

Imagine catching a fleeting glimpse of someone so breathtaking that it feels less like a brief encounter and more like a brush with the divine, timeless beauty of creation itself. The poet feels that this sudden departure wasn't just a casual passing; it stirred an ancient memory in the soul, as if reminding them of a sacred bond from before time began. They vanished in an instant, but that single glimpse became an unforgettable event etched forever in the heart.