The main problem is that people are confused about what's good and what's bad. Different people have different reasons for this confusion. Generally, if they think something makes them look terrible, they won't admit to it at all. But they think being timid shows good character. They think being compassionate does too. They think being foolish is what slaves do. And they absolutely won't admit to things that harm society. Most of the time, people will confess to their mistakes only when they think those mistakes happened against their will — like with timidity and compassion. If someone admits they lack self-control, they blame it on love or passion. They say it wasn't their choice. But people don't think injustice happens against their will. They also think jealousy happens against their will. That's why they'll admit to being jealous too.
The chief thing (the ruling thing) is inconsistency and confusion in the things which relate to good and evil. But different men have different reasons; and generally what they imagine to be base, they do not confess at all. But they suppose timidity to be a characteristic of a good disposition, and compassion also; but silliness to be the absolute characteristic of a slave. And they do not at all admit (confess) the things which are offences against society. But in the case of most errors for this reason chiefly they are induced to confess them, because they imagine that there is something involuntary in them as in timidity and compassion; and if a man confess that he is in any respect intemperate, he alleges love (or passion) as an excuse for what is involuntary. But men do not imagine injustice to be at all involuntary. There is also in jealousy, as they suppose, something involuntary; and for this reason they confess to jealousy also.