It's the painter's job to capture the moment, the look of the young woman at work among the flowers in such a way that the viewer is pulled emotionally into the painting. As we look at the woman, we wonder what her state of mind is.
The writer's job is to know the why of this painting and render it in a way that connects the reader to an image of the woman among flowers as well as the story behind her wan smile. It is the writer's job to understand the tension of the moment and show it with as few words as possible so that the reader is pulled into the moment.
This is the intersection of visual art and written art.
The same is true of the painting above. We see it through the eyes of the artist as the artist expresses what he feels, what he sees from his emotional state. We see through the artist's eyes.
The same is true of writers. Imagine you've just learned your mother has died. How does that affect how you see the mother and child? How would you describe what you see?
Now imagine you've just held your newborn son or daughter for the first time. How does that affect what you see and how you would describe it?
As writers, the reader sees through our eyes and feels what we feel, if we do our work well. A flat telling of what we see will come across as emotionless to the reader whereas a few details, just a few so that we don't get in the reader's way, will bring life to this moment, whether it's sadness or joy.