You’ve got a secret. There are things you’ve never told anyone about yourself. You feel if other people knew they would completely change their opinion of you. In your worst nightmare they’d judge you and you’d be out there, on your own.
More people than you’d think have a secret. In a consultation I might ask someone if there is something they’ve never told anyone. ‘I don’t need you to tell me it’ I say ‘just tell me if there is something that no one knows about you’.