Aristotle, Nicomachean Ethics
H. Rackham, Ed.

[5] When therefore the law lays down a general rule, and thereafter a case arises which is an exception to the rule, it is then right, where the Iawgiver's pronouncement because of its absoluteness is defective and erroneous, to rectify the defect by deciding as the lawgiver would himself decide if he were present on the occasion, and would have enacted if he had been cognizant of the case in question. [6] Hence, while the equitable is just, and is superior to one sort of justice, it is not superior to absolute justice, but only to the error due to its absolute statement. This is the essential nature of the equitable: it is a rectification of law where law is defective because of its generality. In fact this is the reason why things are not all determined by law: it is because there are some cases for which it is impossible to lay down a law, so that a special ordinance becomes necessary. [7] For what is itself indefinite can only be measured by an indefinite standard, like the leaden rule¹ used by Lesbian builders; just as that rule is not rigid but can be bent to the shape of the stone, so a special ordinance is made to fit the circumstances of the case. [8]

It is now plain what the equitable is, and that it is just, and that it is superior to one sort of justice. And from this it is clear what the equitable man is: he is one who by choice and habit does what is equitable, and