 The question remains as to how the doctrine of practical wisdom relates to the general moral theory of medieval thinkers. Writers such as Eckhart and Taler rejected Aristotelian virtues in favor of more religious ones, acceptance (Gelassenheit) and detachment (Abgeschiedenheit), but even Thomas Aquinas had difficulty incorporating the rational theory of practical wisdom into his overall understanding of the moral life. Confronted with the conflicting claims of Aristotelian Ethics and the Augustinian doctrine of grace, he asserts in a sermon to young Dominicans: