The purpose of the paper is to study the interrelatedness of rationality, virtue, and practical wisdom in Aristotle’s Nicomachean Ethics by offering a critical interpretation of the bipartition of the soul presented in chapter 13 of the first book. Aristotle relies on the partition of the soul into a rational and a non-rational part when he distinguishes between ethical and intellectual virtues. The paper will question the adequacy of these divisions and show that Aristotle himself casts doubt on them while leaving open the possibility of understanding the soul in an alternative way which will prove to fit better with his own exposition of deliberate choice and the integration of virtuous action and practical wisdom.