19. The leading one of these is prudence; by whose means, indeed, it is that reasoning bears rule over the passions.
20. Of the passions, pleasure and pain are the two most comprehensive; and they also by nature refer to the soul.
21. And there are many attendant affections surrounding pleasure and pain.
22. Before pleasure is lust; and after pleasure, joy.
23. And before pain is fear; and after pain is sorrow.
24. Wrath is an affection, common to pleasure and to pain, if any one will pay attention when it comes upon him.
25. And there exists in pleasure a malicious disposition, which is the most multiform of all the affections.