Aristotle explains that ontologically the operation of the economic dimension of reality is inextricably related to the moral and political spheres. The economic element is integrated in real action with other realms relating to the acting human person. The various domains mutually influence one another in an ongoing dynamic fashion.

Aristotle explains that practical science recognizes the inexact nature of its conclusions as a consequence of human action which arises from each person’s freedom and uniqueness. Uncertainty emanates from the nature of the world and the free human person and is a necessary aspect of economic actions that will always be in attendance. Aristotle observes that a practical science such as economics must be intimately connected to the concrete circumstances and that it is proper to begin with what is known to us.