In the complex mythology of William Blake, Urizen /ˈjʊrɪzən/ is the embodiment of conventional reason and law. He is usually depicted as a bearded old, white man; he sometimes bears architect's tools, to create and constrain the universe; or nets, with which he ensnares people in webs of law and conventional society. Originally, Urizen represented one half of a two-part system, with him representing reason and Los, his opposition, representing imagination. In Blake's reworking of his mythical system, Urizen is one of the four Zoas that result from the division of the primordial man, Albion, and he continues to represent reason.