There is something, however humble, which can properly be called skill among those who recognise themselves as economists. - Kenneth E. Boulding

The world moves into the future as a result of decisions, not as a result of plans. Plans are significant only insofar as they affect decisions.

Two possible approaches to the organization of general systems theory suggest themselves, which are to be thought of as complementary rather than competitive, or at least as two roads each of which is worth exploring. The first approach is to look over the empirical universe and to pick out certain general phenomena which are found in many different disciplines, and to seek to build up general theoretical models relevant to these phenomena. The second approach is to arrange the empirical fields in a hierarchy of complexity of organization of their basic "individual" or unit of behavior, and to try to develop a level of abstraction appropriate to each.

The human being, on the other hand, is firmly located in a temporal process. He has an image of the past which extends back far beyond the limits of his own life and experience, and he likewise has an image of the future. Closely associated with the time structure of his image is the image of the structure of relationships. Because we are aware of time, we are also aware of cause and effect, of contiguity and succession, of cycles and repetition. The image of man is also characterized by a much greater degree of self-consciousness and of self-awareness than that of the lower animals. We not only know, but we know that we know. This reflective character of the human image is unique, and is what leads to philosophy.