Book 1
10.5
This will be perfectly clear, partly from what has already been said about the virtues, and partly from what will be said about the emotions. It remains to state the motives and character of those who do wrong and of those who suffer from it.
10.6
First, then, let us decide what those who set about doing wrong long for or avoid; for it is evident that the accuser must examine the number and nature of the motives which are to be found in his opponent; the defendant, which of them are not to be found in him.
10.7
Now, all human actions are either the result of man's efforts or not. Of the latter some are due to chance, others to necessity. Of those due to necessity, some are to be attributed to compulsion, others to nature, so that the things which men do not do of themselves are all the result of chance, nature, or compulsion. As for those which they do of themselves and of which they are the cause, some are the result of habit, others of longing, and of the latter some are due to rational, others to irrational longing.
10.8
Now wish is a [rational] longing for good, for no one wishes for anything unless he thinks it is good; irrational longings are anger and desire. Thus all the actions of men must necessarily be referred to seven causes: chance, nature, compulsion, habit, reason, anger, and desire.
