be all in (one's)/the mind

be all in (one's)/the mind

To exist solely in one's thoughts, rather than in reality. Don't tell me that my worries are all in my mind—you know this can be a dangerous area. Your presentation sounded great, honestly. Your fears are all in the mind.
See also: all, mind
Farlex Dictionary of Idioms.

be all in somebody’s/the ˈmind

not be true or real; be imagined: She’s not really ill — it’s all in the mind.
See also: all, mind
Farlex Partner Idioms Dictionary
See also:
  • be all in somebody's/the mind
  • run (one's) own show
  • run one's own show
  • glue
  • (with) (one's) eyes glued to (something)
  • make (one's) own luck
  • make your own luck
  • gender binary
  • just for love
  • have (one's) eyes glued to (something)