The structural changes in the system constitute acts of cognition. By specifying which perturbations from the environment trigger its changes, the system ‘brings forth a world’, as Maturana and Varela put it. Cognition, then, is not a representation of an independently existing world, but rather a continual bringing forth of a world through the process of living. The interactions of a living system with its environment are cognitive interactions, and the process of living itself is a process of cognition. In the words of Maturana and Varela, ‘to live is to know’.
- Fritjof Capra The Web of Life p260