The lexeme Charakter denotes the set of innate or acquired dispositions that make an individual or a nation distinctive, determine its behaviour, and give it psychological and moral strength. Charakter plays a central role in Goethe’s moral psychology and his ethical thought in general, as well as in his thinking on culture. His psychological and ethical thought is notoriously hard to classify or to align with the main traditions of European thought. His concern with Charakter could be said to belong to the broad classical tradition of virtue ethics, in the sense that Goethe placed moral character at the heart of ethics. However, in contrast to the classical tradition of virtue ethics, which holds that both the rational and the non-rational parts of humans contribute to a virtuous character, and that virtues can be conceptualized clearly, Goethe resists the claims of reason on our moral character. His early writings on culture and the drama Egmont have a Rousseauian flavour: Charakter represents a natural force that is endangered by civilization. After the French Revolution and in opposition to the emergence of liberalism, Goethe came to see Charakter as a political resource that was superior to political rationality. In his most sustained engagements with philosophical ethics—his essays on Johann Joachim Winckelmann (1805) and Isaac Newton (1810)—Goethe argues, in deliberate opposition to Kant, that natural Charakter has at least as much ethical force as reason and that naturalistic descriptions of human behaviour are at least as valid as moral ones. Moreover, Charakter has the advantage of leading us by a more direct and reliable route to morally good outcomes. In this sense, it can be said without risk of exaggeration that Charakter displaces rationality in Goethe’s ethical thought.