Can mind comprehend its limits? Since Kant this has become a familiar question for theoretical reason, but for Aristotle it was crucial for practical reason. It is, after all, a primary task of practical reason to create, shape or sustain the polis; and, for him, the boundaries of the polis ought to capture the domain of robust human logos. That is, citizenship ought to be granted to all and only those capable of the practical reason involved in ruling and being ruled.1. Legislators are to use their practical reason to determine who else is capable of the practical reason necessary for citizenship. So, in determining the shape and extent of the polis, practical reason should set its own boundaries. The polis becomes the field of human logos; at least in the sense that it is the arena in which practical reason achieves its full and proper expression.2. Moreover, when legislators exercise their practical reason well, they craft a polis which both encourages and makes room for the exercise of theoretical reason on the part of those who are capable of it. The polis, then, is the place where both practical and theoretical reason reach fruition.
But there is also a deeper sense in which, for Aristotle, the polis is the field of logos. The polis is neither a brute element of the universe, nor is it the outcome of rigidly instinctual behaviour, as is, say, a bee____________________