““Chapter 1 argues that at the heart of Aztec metaphysics stands the ontological thesis that there exists at bottom just one thing: dynamic, vivifying, eternally self-generating and self-regenerating sacred power, force, or energy. The Aztecs referred to this power as teotl. Reality and thus the cosmos and all its inhabitants are identical with and consist of teotl. Since teotl is constitutionally uniform, reality consists ultimately of just one kind of stuff: energy.””