"If the variables are continuous, this definition corresponds to the description of a dynamic system by a set of ordinary differential equations with time as the independent variable. However, such representation by differential equations is too restricted for a theory to include biological systems and calculating machines where discontinuities are ubiquitous."

“Cybernetics, based upon the principle of feedback or circular causal trains providing mechanisms for goal-seeking and self-controlling behavior.”

“Game theory, analyzing in a novel mathematical framework, rational competition between two or more antagonists for maximum gain and minimum loss.”

“Another recent development is the theory of formal organizations, that is, structures planfully instituted, such as those of an army, Bureaucracy, business enterprise, etc. This theory is framed in a philosophy which accepts the premise that the only meaningful way to study organization is to study it as a system.”

“Progress is only possible by passing from a state of undifferentiated wholeness to differentiation of parts.”

“Classical science in its diverse disciplines, be it chemistry, biology, psychology or the social sciences, tried to isolate the elements of the observed universe - chemical compounds and enzymes, cells, elementary sensations, freely competing individuals, what not -- expecting that, by putting them together again, conceptually or experimentally, the whole or system - cell, mind, society - would result and be intelligible. Now we have learned that for an understanding not only the elements but their interrelations as well are required: say, the interplay of enzymes in a cell, of many mental processes conscious and unconscious, the structure and dynamics of social systems and the like.”

“General Systems Theory... possibly the model of the world as a great organization can help to reinforce the sense of reverence for the living which we have almost lost.”