Standing in the shadow

“How can I be substantial if I do not cast a shadow? I must have a dark side also If I am to be whole” ― C.G. Jung

And I found this poem which fits even as it doesn't. It disturbs me.

“A song she heard
Of cold that gathers
Like winter's tongue
Among the shadows
It rose like blackness
In the sky
That on volcano's
Vomit rise
A Stone of ruin
From burn to chill
Like black moonrise
Her voice fell still...” ― Robert Fanney