“What pattern connects the crab to the lobster and the orchid to the primrose and all the four of them to me? And me to you? And all the six of us to the amoeba in one direction and to the back-ward schizophrenic in another? […] What is the pattern which connects all the living creatures?” (Gregory Bateson, 1979)
"To say that a system is complex […] is to say that we can describe the same system in a variety of distinct ways […]. Therefore a system is simple to the extent that a single description suffices to account for our interaction with the system; it is complex to the extent that it fails to be true."
(Robert Rosen, 1978)
“Complexity is not an intrinsic property of a system nor of a system description. Rather, it arises from the number of ways in which we are able to interact with the system. Thus, complexity is a function not only of the system’s interactive capabilities, but of our own”
(Robert Rosen, 1985)