At the end of the trials of Hunahpu and Xblanque, the unending night is lifted as the hero twins climb out of Xiabalba and into the Heavens to become the Sun and Moon. This event becomes even more transformative once the first humans come into existence, which the final half of the Popol Vuh covers in great detail.
When the gods are finally successful in making humans, the animals play a role as well. There seems to be an indication of a type of harmony or cooperation between nature and the gods in making people here, not just with the animals helping out, but also in the importance of maize and other foods in making people. This is also interesting because maize really does become a huge part of agriculture and diet across Meso and South America, especially through the process of nixtamalization (and, honestly, we make so much from byproducts of maize’s descendant, corn, nowadays too). While the humans are capable of language and of faith in the gods, they pretty immediately make the mistake of having a touch of hubris when they claim to know everything. This displeases the gods, as even the gods are not all-knowing, and so they resolve to cloud the vision of humans. I can see where they are coming from with that decision. Even as the humans’ vision becomes clouded, they are able to remember the gods, and begin to pray for light.
This coincides with the first sunrise, where it is said that the heat from the sun physically changes the Earth and dries up the marshy environment that was there before. It is also said that only the very first people know the sun’s true face- what we see now is merely a reflection of what once was. The first dawn, and the rising of the sun, moon, and stars, bring clarity and stability to the Earth, and enable the first humans to begin to form a settlement on the mountaintop where they witnessed the first dawn. The first sunrise is welcomed not only by humans, but also by the animals that were on Earth before them. There is a great sense of unity across the world during the first dawn, which is encapsulated (beautifully) in the lines: “However many nations/ live in the world today,/ however many countless people/ they all had but one dawn.” (pg. 237) From there, all of history is ahead for them.