My brother and I like trading etymologies; eg. glamour comes from grammar; silly from holy etc. He always held that the word idiot originally meant non-conformist. I thought before going further with that one I should check it out on good old Wiki and sure enough learn that the word idiot does indeed come from the ancient Greek idiotes, which refers to a person disinterested in participating in democracy and public life. These people were viewed as selfish, contemptible and stupid as they were more concerned with their daily personal affairs than they were of the good of the society.
Later in the middle-ages the word took on additional connotations associated with being stupid or mentally incapable.
Mark Twain. Suppose you were an idiot. And suppose you were a member of Congress. But I repeat myself.
Blackadder and Baldrick
Baldrick: I nearly won the village-idiot-of-Wimbledon contest but I was disqualified at the last minute.
Blackadder: Really? What happened?
Baldrick: I showed up.
Sometimes I feel a bit of an idiot