Of the Quasi-integral Parts of Justice

We must now consider the quasi-integral parts of justice, which are "to do good," and "to decline from evil," and the opposite vices. Under this head there are four points of inquiry:

(1) Whether these two are parts of justice?

(2) Whether transgression is a special sin?

(3) Whether omission is a special sin?

(4) Of the comparison between omission and transgression.