1- The moth is largely associated with night-time and therefore connects with the hidden side of our nature. Also, because the moth can be self-destructive when there is light around, it tends to symbolise our dream self and the more transient side of our personality.
2- As the butterfly is taken as the symbol for the soul, so the moth symbolises the darker side of us which uses fantasy.
The moth emerging from darkness signifies the recognition of self we must all achieve to survive.
3- The moth symbolises the Self, but perhaps in its darker sense.... Ten Thousand Dream Dictionary