Common to the concepts of balance, congruity, and dissonance is the notion that thoughts, beliefs, attitudes, and behavior tend to organize themselves in meaningful and sensible ways. In the respect, people who live in glass houses apparently do not throw stones, the concept of consistency underscores and presumes human rationality. It holds that behavior and attitudes are not only consistent to the objective observer, but that individuals try to appear consistent to themselves. It assumes that inconsistency is a noxious state setting up pressures to eliminate it or reduce it. The concepts of consistency are not novel. Nor are they indigenous to the study of attitudes, behavior, or personality. These concepts have appeared in various forms in almost all sciences. It has been argued by some that it is the existence of consistencies in the universe that made science possible, and by others that consistencies in the universe are a proof of divine power. There is, of course, a question of whether consistencies are real or mere products of ingenious abstraction and conceptualization. For it would be entirely possible to categorize natural phenomena in such a haphazard way that instead of order, unity, and consistency, one would see a picture of utter chaos. If one of the spatial dimensions were to be eliminated from the conception of the physical world, the known consistencies and the consistencies which allow human to make reliable predictions would be vastly depleted. The concept of consistency in man is, then, a special case of the concept of universal consistency. The fascination with this concept led some psychologists to rather extreme positions.