We must now consider the parts of justice; (1) the subjective parts, which are the species of justice, i.e. distributive and commutative justice; (2) the quasi-integral parts; (3) the quasi-potential parts, i.e. the virtues connected with justice. The first consideration will be twofold: (1) The parts of justice; (2) their opposite vices. And since restitution would seem to be an act of commutative justice, we must consider (1) the distinction between commutative and distributive justice; (2) restitution.

Under the first head there are four points of inquiry:

(1) Whether there are two species of justice, viz. distributive and commutative?

(2) Whether in either case the mean is take in the same way?

(3) Whether their matter is uniform or manifold?

(4) Whether in any of these species the just is the same as counter-passion?