Coherence and harmony in relations and interactions between the members of a human social system are due to the coherence and harmony of their growth in it, in an ongoing social learning which their own social (linguistic) operation defines and which is possible thanks to the genetic and ontogenetic processes that permit structural plasticity of the members.

p. 199 as cited in: Vincent Kenny (1989) "Life, the Multiverse and Everything; an Introduction to the Ideas of. Humberto Maturana". - The tree of Knowledge (1987)