Final answer:
Tecuciztecatl and Nanahuatzin from Aztec mythology both became suns through self-sacrifice, embodying a theme of the importance of sacrifice in Mesoamerican cultures.
Step-by-step explanation:
Tecuciztecatl and Nanahuatzin are figures in Aztec mythology associated with the creation of the sun. Although literature specifically about these figures is not included in the provided references, these characters are generally known in relation to Aztec creation myths. Broadly, their myth represents the idea that self-sacrifice is necessary for the renewal of the world.
Tecuciztecatl was initially a proud deity who hesitated to jump into a fire to become the sun, whereas Nanahuatzin, considered less mighty and humble, jumped into the fire without hesitation. Ultimately, both deities became suns in the sky, with Tecuciztecatl as the brighter one due to his eventual sacrifice. This narrative reflects a theme common in Mesoamerican cultures: the importance of sacrifice for the greater cosmic order, similar to the tales surrounding Quetzalcoatl and the gods depicted in various codices like the Borgia Codex.