careless about the welfare of one’s country, and so on. * Those are neither duties, nor contrary to duty, which reason neither selects to do, nor, on the other hand, repudiates, such actions, for instance, as to pick up straw, to hold a pen, or a comb, or things
Again, there are some duties which do not depend on circumstances, and some which do. These do not depend on circumstances, to take care of one’s health, and of the sound state of one’s senses, and the like. Those which do depend on circumstances, are the mutilation of one’s members, the sacrificing of one’s property, and so on. And the case of those actions which are contrary to duty, is similar. Again, of duties, some are always such, and some are not always. What is always a duty, is to live in accordance with virtue; but to ask questions, to give answers, to walk, and the like, are not always duties. And the same statement holds good with respect to acts contrary to duty.
There is also a class of intermediate duties, such as the duty of boys obeying their masters.
LXIII. The Stoics also say that the mind is divisible into eight parts; for that the five organs of sensation, and the vocal power, and the intellectual power, which is the mind itself, and the generative power, are all parts of the mind. But by error, there is produced a perversion which operates on the intellect, from which many perturbations arise, and many causes of inconstancy. And all perturbation is itself, according to Zeno, a movement of the mind, or superfluous inclination, which is irrational, and contrary to nature. Moreover, of the superior class of perturbations, as Hecaton says, in the second book of his treatise on the Passions, and as Zeno also says in his work on the Passions, there are four kinds, grief, fear, desire, and pleasure. And they consider that these perturbations are judgments, as Chrysippus contends in