Do you think that the forest here refers to the speakers mind ? Why?

The forest, dark and snowy, represents the speaker's mind. From his intuition that "something else is alive" and "near," he knows that an idea must be developing within it, even if he can only sense its outlines emerging from his mind's depth. At the end of the poem, the idea sparked by the fox's image enters "the dark hole" of the speaker's head, echoing the dense forest beyond his window.