be living in a fool's paradise

be living in a fool's paradise

If someone is living in a fool's paradise, they believe wrongly that their situation is good, when really it is not. Anyone who believes that this deal heralds a golden new era for the European air traveller is living in a fool's paradise. Note: You can also use a fool's paradise on its own to mean a situation where someone thinks things are good, but really they are not. Mrs Deedes looks much happier. But surely hers is a fool's paradise.
See also: living, paradise