Book 7
1.109
Again, some duties are incumbent unconditionally, others in certain circumstances. Unconditional duties are the following: to take proper care of health and one’s organs of sense, and things of that sort. Duties imposed by circumstances are such as maiming oneself and sacrifice of property. And so likewise with acts which are violations of duty. Another division is into duties which are always incumbent and those which are not. To live in accordance with virtue is always a duty, whereas dialectic by question and answer or walking-exercise and the like are not at all times incumbent. The same may be said of the violations of duty.
1.110
And in things intermediate also there are duties; as that boys should obey the attendants who have charge of them.
1.110
According to the Stoics there is an eight-fold division of the soul: the five senses, the faculty of speech, the intellectual faculty, which is the mind itself, and the generative faculty, being all parts of the soul. Now from falsehood there results perversion, which extends to the mind; and from this perversion arise many passions or emotions, which are causes of instability. Passion, or emotion, is defined by Zeno as an irrational and unnatural movement in the soul, or again as impulse in excess.
1.110
The main, or most universal, emotions, according to Hecato in his treatise On the Passions, book ii., and Zeno in his treatise with the same title, constitute four great classes, grief, fear, desire or craving, pleasure.
1.111
They hold the emotions to be judgements, as is stated by Chrysippus in his treatise On the Passions: avarice being a supposition that money is a good, while the case is similar with drunkenness and profligacy and all the other emotions.
