The quest for the holy grail, as it were, in the positivist, modern philosophical tradition centres around the empirical study of past and current objects and phenomenon in order to predict future events. Let us now examine Seigel's use of complexity theory to explain brain processes. As Siegel puts its small changes in the micro-components of the system can lead to large changes in the macro-behavior of the organism. These properties operating in tandem give the sense of freedom as well as cohesion within the system over time as we flow from state to state. At this juncture, let us remember the question posed in the Introduction with respect to the effects on the entire family when adult children return home. They maintain that Chaos theory has two important mathematical characteristics (a) it is concerned with dynamics, or how things change over time; and (b) it is concerned with nonlinearity, or with the mutual interaction of cause and effect variables.