 To this extent, this metaethical view shares the ambitions of Kantian constructivism to ground normative truths in features of rational agency. In contrast to Kantian models, however, Aristotelians hold that the principles of sound practical reason are neither formal nor procedural. Rather, they are grounded in a substantive account of the good life, which is inspired by ancient eudaimonism. The wise and virtuous agents form the standard of practical rationality through the exercise of their virtues of intellect and character (Aristotle Nicomachean Ethics, II.6.