Seeing a miller in a dream signifies warmth, comfort, and security. Though the dream might seem sad when a miller is working long hours at a mill, it is actually letting us know that the relationships we have with other people are still okay despite challenges we might experience in our life.
The miller in a dream not only symbolizes something about achieving growth, but also about being prudent for the future. The use of this image can point to someone thinking about how much they have achieved and how fast they have been growing by simply keeping a steady pace at learning or specializing.