every shut eye isn't asleep

Alternative forms

 * a large number of alternative forms exist, e.g. "all closed eyes aren't sleeping", using "ain't", or using "closed" instead of "shut" and "sleep" or "sleeping" instead of "asleep", or pluralizing "eye" to "eyes" (at which point "all" is used instead of "every" and "aren't" is used instead of "isn't")

Proverb

 * 1)  One must be careful, because some people who seem not to be paying attention are actually paying attention.