I am not sure if this has a positive or negative connotation. Perhaps it has both. The prisoner thinking that there is no prison does not see the prison because the prisoner might be insane. Might be suffering from dementia. Or the prisoner does not feel that a prison is holding the prisoner due to some mental capabilities that were picked up in a place where mental skills are trained to meet such situations and conditions. It might be that two things are possible. This is a watercolor on paper.