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.

Common Names:

Name	Pronounced	Usage
Mariamne	-	History
Adalfarus	-	Ancient Germanic (Latinized)
Iounia	-	Biblical Greek
Prudentius	-	Late Roman
Horst	HAWRST	German
Vayu	-	Hinduism