live in a fool's paradise

live in a fool's paradise

To be in a happy state for foolish, unfounded, or delusional reasons. We were living in a fool's paradise thinking that the financial successes of the early 2000s would last forever.
See also: live, paradise
References in periodicals archive ?
Alun Ffred Jones, Plaid Cymru AM for Caernarfon, said, 'Many Assembly Members live in a fool's paradise.