Why was the most precious treasure human blood to the Aztec's?

For the Aztecs, human blood was considered the most precious treasure because it was believed to be a vital source of life and a means to nourish their gods. They thought that the sun, which was central to their cosmology, required human sacrifice to rise each day, and blood was seen as a sacred offering that sustained the divine. This belief reinforced their religious practices and societal structure, where ritual sacrifice served both spiritual and political purposes. Thus, blood was not only a symbol of life but also a critical element in maintaining cosmic order and divine favor.