1
general::
Be undecided, vacillate between two alternatives, as in She's of two minds about her new job? it's much closer to home but Also less challenging. Put as in two minds, this idiom was first recorded in 1853, but variants such as diverse minds and twenty minds date back to the early 1500s.
American Heritage Idioms
2
general::
Phrase(s): of two minds (about someone or something)
Fig. holding conflicting opinions about someone or something; being undecided about someone or something. • I am of two minds about whether I should go to the convention.
McGrawhill's American Idioms And Phrasal Verbs