Brutus’ De virtute, a lost work that had important but overlooked influence on Cicero’s ethical dialogues, is more dependent on Antiochus’ ethics than has been recognized. In reviewing the sources for De virtute, I arrive at a conception of Brutus’ work as a consolation written in a fundamentalist—rather than ecumenical—mode that focalizes its arguments and commonplaces from the perspective of Antiochus’ philosophical system. This conception is supported by the only other testimony for Brutus’ consolatory writing.