A picture is worth a thousand words is a saying that applies to many photographs and the words will be different from every person looking at the photo.
If a photograph is a good one truly lies in the eyes of the beholder. A picture creates a feeling in the person viewing it such as feeling cold, hot, fun and inspired.
Many factors influence the outcome of a photograph. The angle of the photo, the lighting and the sharpness are examples of parameters that affect the result.
What the person studying a photo will appreciate will be individual and unique.