( saying ) if you do not know about sth, you cannot worry about it :
Some doctors believe ignorance is bliss and don't give their patients all the facts.
( saying ) if you do not know about sth, you cannot worry about it :
Some doctors believe ignorance is bliss and don't give their patients all the facts.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005