Living systems are units of interactions; they exist in an ambience. From a purely biological point of view they cannot be understood independently o… - Humberto Maturana

I maintain that learned orienting interactions, coupled with some mode of behavior that allowed for an independent recursive expansion of the domain of interactions of the organism, such as social life... and/or tool making and use, must have offered a selective basis for the evolution of the orienting behavior that in hominids led to our present-day languages.

We say that the words were smooth, caressing, hard, sharp, and so on: all words that refer to body touching. Indeed we can kill or elate with words as body experiences. We kill or elate with words because, as co-ordinations of actions, they take place through body interactions that trigger in us body changes in the domain of physiology.

Man knows and his capacity to know depends on his biological integrity; furthermore, he knows that he knows. As a basic psychological and, hence, biological function cognition guides his handling of the universe and knowledge gives certainty to his acts; objective knowledge seems possible and through objective knowledge the universe appears systematic and predictable.