I. We are told by the poet Simonides, Sossius Senecio, that the Trojans bore no malice against the Corinthians for joining the rest of the Greeks in the siege of Troy, because Glaukus, who was himself of Corinthian extraction, fought heartily on their side. In the same manner we may expect that neither Greeks nor Romans will be able to blame the doctrines of the academy, as each nation derives equal credit from their practice in this book of mine, which contains the lives of Brutus and Dion, of whom the latter was Plato's intimate friend, while the former was educated by his writings: so that they were both, as it were, sent forth from the same school to contend for the greatest prizes. It is not surprising, therefore, that there should be a great similarity between their respective achievements, or that they should have proved the truth of that maxim of their teacher, that nothing great or noble can be effected in politics except when a wise and just man is possessed of absolute power combined with good fortune. Just as Hippomachus the gymnastic trainer used to declare that he could always tell by their carriage those who had been his pupils, even though he only saw them from a distance when they were carrying meat home for their dinner, so we may imagine that philosophy accompanies those who have been brought up in its precepts in every action of their lives, adding a happy grace and fitness to all that they do. II. Their lives resemble one another even more in their misfortunes than in the objects at which they aimed. Both of them perished by an untimely fate, unable, with all their mighty efforts, to accomplish the object which they had in view. The most remarkable point of all is that they both received a supernatural warning of their death by the appearance to them of an evil spirit in a dream. Yet it is a common argument with those who deny the truth of such matters that no man of sense ever could see a ghost or spirit but that it is only children and women and men who are wandering in their mind through sickness, who through disorder of the brain or distemperature of the body are subject to these vain and ominous fancies, which really arise from the evil spirit of superstition within themselves. If, however, Dion and Brutus, both of whom were serious and philosophic men, not at all liable to be mistaken or easy to be deceived about such matters, did really experience a supernatural visitation so distinctly that they told other persons about it, I do not know whether we may not be obliged to adopt that strangest of all the theories of the ancients that evil and malignant spirits feel a spite against good men, and try to oppose their actions, throwing confusion and terror in their way in order to shake them in their allegiance to virtue; because they fear lest if they passed their lives entirely pure and without spot of sin, they might after death obtain a higher place than themselves.