Siegfried’s longing for the mother-imago has unwittingly exposed him to the danger of looking back to his childhood and to the human mother, who immediately changes into the death-dealing dragon.
Jung demonstrates that the mother-imago harbours a fatal regressive pull: the longing for the nurturing mother constellates its destructive counterpart, figured mythologically as the devouring dragon.
, Symbols of Transformation, 1952thesis