Justice of Actions, is by Writers divided into Commutative, and Distributive; and the former they say consisteth in proportion Arithmeticall; the later in proportion Geometricall. Commutative therefore, they place in the equality of value of the things contracted for; And Distributive, in the distribution of equall benefit, to men of equall merit. As if it were Injustice to sell dearer than we buy; or to give more to a man than he merits. The value of all things contracted for, is measured by the Appetite of the Contractors: and therefore the just value, is that which they be contented to give. And Merit (besides that which is by Covenant, where the performance on one part, meriteth the performance of the other part, and falls under Justice Commutative, not Distributive,) is not due by Justice; but is rewarded of Grace onely. And therefore this distinction, in the sense wherein it useth to be expounded, is not right. To speak properly, Commutative Justice, is the Justice of a Contractor; that is, a Performance of Covenant, in Buying, and Selling; Hiring, and Letting to Hire; Lending, and Borrowing; Exchanging, Bartering, and other acts of Contract.

And Distributive Justice, the Justice of an Arbitrator; that is to say, the act of defining what is Just. Wherein, (being trusted by them that make him Arbitrator,) if he performe his Trust, he is said to distribute to every man his own: and his is indeed Just Distribution, and may be called (though improperly) Distributive Justice; but more properly Equity; which also is a Law of Nature, as shall be shewn in due place.