what the eye doesn't see

what the eye doesn't see

People say what the eye doesn't see to mean that if someone does not know about something, it cannot upset them. `Can I take a break?' — `Sure. The boss is miles away, and what the eye doesn't see.' Note: People sometimes use the full expression what the eye doesn't see, the heart doesn't grieve over. He knew his father would disapprove, but what the eye doesn't see, the heart doesn't grieve over.
See also: eye, see, what