In William Blake's mythological framework, Los represents the embodiment of human creativity and imagination, serving as the earthly manifestation of Urthona, one of the four Zoas. As the "eternal prophet," Los is depicted as a blacksmith and craftsman, laboring at his forge to shape the material world and construct the visionary city of Golgonooza, which symbolizes artistic and spiritual endeavor. Blake's illustrations often portray Los in the act of creation, emphasizing his role in the continuous struggle against the forces of reason and oppression, as personified by Urizen. These depictions highlight Los's significance as a creative force striving to infuse the world with imagination and spiritual vitality.