8. In looking at the means taken and the circumstances that accompany those means, it is important to have a ready rule for pronouncing what particular belongs to the means and what to the circumstances. Thus Clytemnestra deals her husband Agamemnon a deadly stroke with an axe, partly for revenge, partly that she may take to herself another consort; is the deadliness of the blow part of the means taken or only an accompanying circumstance? It is part of the means taken. The means taken include every particular that is willed and chosen as making for the end in view. The fatal character of the blow does make to that end; if Agamemnon does not die, the revenge will not be complete, and life with Aegisthus will be impossible. On the other hand, the fact that Clytemnestra is the wife of the man whom she murders, is not a point that her will rests upon as furthering her purpose at all; it is an accompanying circumstance. This method of distinguishing means from circumstance is of great value in casuistry. 9. It is clear that not every attendant circumstance affects the morality of the means taken. Thus the blow under which Agamemnon sank was neither more nor less guiltily struck because it was dealt with an axe, because it was under pretence of giving him a bath, or because his feet were entangled in a long robe. These circumstances are all irrelevant. Those only are relevant which attach some special reasonableness or unreasonableness to the thing done Thus the provocation that Clytemnestra had from her husband's introduction of Cassandra into her house made her act of vengeance less unreasonable: on the other hand it was rendered more unreasonable by the circumstance of the dear and holy tie that binds wife to husband. The provocation and the relationship were two relevant circumstances in that case. 10. But it happens sometimes that a circumstance only affects the reasonableness of an action on the supposition of some previous circumstance so affecting it. Thus to carry off a thing in large or small quantities does not affect the reasonableness of the carrying, unless there be already some other circumstance attached that renders the act good or evil; as for instance, if the goods that are being removed are stolen property. Circumstances of this sort are called _aggravating_--or, as the case may be, _extenuating_--circumstances. Circumstances that of themselves, and apart from any previous supposition, make the thing done peculiarly reasonable or unreasonable, are called _specifying_ circumstances. They are so called, because they place the action in some species of virtue or vice; whereas _aggravating_ or _extenuating_ circumstances add to, or take off from, the good or evil of the action in that species of virtue or vice to which it already belongs.