In Aztec mythology, the deity associated with the duality of life and death is often represented by Tezcatlipoca. He embodies the cycles of existence, illustrating the interconnectedness of creation and destruction. As a god of war, fate, and the night sky, Tezcatlipoca serves as a reminder of the transient nature of life, emphasizing the balance required in understanding both aspects. His narratives often reflect themes of transformation and the dualities present in the natural world.