Which side of the mirror are you on? Figure that out and you’ll find your way into the labyrinth

Plotinos, Enneads 4.3.12
The souls of humans, having seen their images as in the mirror of Dionysos, became there having leapt from above.

Proklos, Commentary on the Timaios 2.8.19
Dionysos sees his own image in the mirror and goes out into the whole divided creation.