"Among the Aztecs the football represents the sun, and when they had their games, this represented the struggle of the light against the darkness. It was a ritual movement studied beforehand (...)
The ball game among the Aztecs was a liturgy studied beforehand. Each movement corresponded to the liturgy; there were no off-the-cuff movements; all of them had been previously designed. With all those movements, they symbolised or allegorised the struggle between the powers of the light and the powers of darkness
." p.344