 In appropriate action, the agent takes things of value into account. This, however, does not happen in the abstract—she does not weigh the value of wealth against the value of health in a general fashion. Rather, she thinks about the way in which a specific situation and the courses of action available in it involve indifferents—for example, putting on the appropriate clothes for a given occasion (Letter 92.11). Since the features of the situation in which one acts thus matter to appropriate action, the Stoics apparently wrote treatises (now lost) in which they discussed at length how this or that feature may bear on what one should be doing (Sedley 2001). Seneca’s Letters 94 and 95 seem to be examples of this kind of treatise. The very fact that such treatises are written testifies to the fact that indifferents are not simply irrelevant: they are the material of deliberation.