Working from a systematic fundamental-ethical perspective, this study inquires into convergent lines in the foundations of Friedrich Schleiermacher's and Thomas of Aquinas' ethics. Despite their radically different contexts - the one a product of the epoch 'after Kant', the other embedded in the scholastic tradition - these two predominant ethicists have a remarkable amount in common. Taught by theology, advised by Aristotle, both develop an ethics concerned with the unity of nature and reason which takes on concrete form in human actions.