129. It is clear, then, that these and the remaining virtues are related to one another. For courage, which in war preserves one’s country from the barbarians, or at home defends the weak, or comrades from robbers, is full of justice; and to know on what plan to defend and to give help, how to make use of opportunities of time and place, is the part of prudence and moderation, and temperance itself cannot observe due measure without prudence. To know a fit opportunity, and to make return according to what is right, belongs to justice. In all these, too, large-heartedness is necessary, and fortitude of mind, and often of body, so that we may carry out what we wish.