The plain man is familiar with blindness and deafness and knows from his everyday experience that the look of things is influenced by his senses but it never occurs to him to regard the whole world as the creation of his senses.
I know people that could serve me canned tuna and saltine crackers and have me feel more at home at their table than some people who can cook circles around me. The more you try to impress people generally the less you do.