Mystery Is it? Myths surrounding the full moon seem to be as old as… Now, it might not include the "lunacy" that folklore tells us about. This phrase "derives from the Latin for 'moonstruck' ... as people used to think that epilepsy and… Now, it might not include the "lunacy" that folklore tells us about. This phrase "derives from the Latin for 'moonstruck' ... as people used to think that epilepsy and…