In this poem by Ted Hughes, we can see through the imagery the poet chooses how the fox is intended to represent creativity and poetic inspiration. The fox is the "something else...alive" in the "forest" which is evidently metaphorical, given that it is defined by "this blank page where my fingers move." The speaker imagines himself to be adrift in a forest represented by the blank page he finds himself unable to fill with creative output.
If this forest is the poet's mind, the "snow" the poet imagines within it seems to echo the blankness of the page, and the dearth of inspiration into which the fox "sets neat prints," making its mark. The fox seems to creep towards the poet, "brilliantly, concentratedly." The moment of inspiration breaking is represented by the fox entering "the dark hole of the head," after which "the page is printed." The fox of inspiration, then, creeps towards the poet making inroads into the blank emptiness until finally it reaches its target and emerges as the words the poet is seeking.