the distribution of flexibility among the many variables of a system is a matter of very great importance. The healthy system ... may be compared to an acrobat on a high wire. To maintain the ongoing truth of his basic premise ("I am on the wire”), he must be free to move from one position of instability to another, i.e., certain variables such as the position of his arms and the rate of movement of his arms must have great flexibility, which he uses to maintain the stability of other more fundamental and general characteristics. If his arms are fixed or paralyzed (isolated from communication), he must fall.