be of the opinion that

be of the opinion that

To have a particular belief, thought, or view. My mom is of the opinion that people should buy homes instead of renting, but I just don't have that kind of money for a down payment.
See also: of, opinion, that
Farlex Dictionary of Idioms.

be of the opinion that...

(formal) think or believe that...: I’m firmly of the opinion that smoking should be banned in all public places.
See also: of, opinion
Farlex Partner Idioms Dictionary
See also:
  • be of the opinion that...
  • What number are you calling from?
  • buy to let
  • funeral
  • it's someone's funeral
  • be (someone's) funeral
  • listen (to someone or something) with half an ear
  • listen with half an ear
  • bio mom
  • or else