Both Christopher Alexander and Rick Rubin use this exact metaphor.
SYNAPSE ~ Process for identifying the feeling (http://newforum.droqen.com/index.php?msg=2847)
(What is the feeling? The Mirror of the Self.)
~ The Creative Act, "Point of View" (http://newforum.droqen.com/index.php?msg=2813)
QuoteWhen making art, we create a mirror
in which someone may see their own
hidden reflection
~ The Nature of Order: Book One // Chapter Eight: The Mirror of the Self (http://newforum.droqen.com/index.php?msg=1606)
(No quote)
Maybe related to epiphanies (https://newforum.droqen.com/index.php?topic=450.0)? What sort of epiphanies? Epiphanies of the self... mirror of the self is the way to get there...