The quote "Eyelids are really just flesh curtains" from Gail Honeyman's book "Eleanor Oliphant Is Completely Fine" provides an intriguing perspective on something as commonplace as eyelids. This metaphor suggests that eyelids, which protect our eyes and indicate our feelings, can also symbolize barriers between the person we show to the world and our true selves. It reflects a deeper introspection about visibility and perception in human relationships.