A figure shaped like a human but made of fire below and shining metal above is an image of wholeness. The deep mind pictures the complete self as a single person who joins two natures: the burning drives of the lower body and the clear light of the higher mind.
Such an image tends to appear when a person is ready to sense that they are more than their everyday self. The two halves are not at war here; they belong to one form. Seeing them held together in a single figure is the mind's way of showing what a whole human being could actually be.