Cato in his speech for the Rhodians, says, "Are we to prevent them by doing first, what we say they intended to do to us?" On this subject there is a remarkable passage in Aulus Gellius, "When a Gladiator prepares to enter the lists for combat, such is his lot that he must either kill his adversary, or be killed himself. But the life of man is not circumscribed by the hard terms of such an over-ruling necessity, as to oblige him to do an injury to prevent him from receiving one." Quintilian has quoted a passage from Cicero, wherein the orator asks, "Whoever made such a decision, or to whom could such a point be yielded without the most imminent danger, that you have a right to kill the person, by whom you say, you fear that you shall afterwards be killed yourself?" To which this passage of Euripides, may be applied, "If your husband, as you say, intended to have killed you, you ought to have waited, till he actually did make the attempt." Conformably to which Thucydides, in the first book of his history, has expressed himself in the following terms, "The issue of war is uncertain, nor ought we to be so far transported by our fears, as to engage in immediate and open hostilities." The same writer too in his luminous description of the dangerous factions, that had arisen in the Grecian states, condemns the approbation bestowed on the person, that injured or destroyed another from whom he himself apprehended injury or destruction." Livy says, "Men, to guard against their alarms, make themselves objects of terror; averting the danger from their own heads, by imposing upon others the necessity of either doing or suffering the evil which they themselves fear." Vibius asked a person, that appeared armed in the forum, "Who gave you permission to shew your fear in this manner?" A question not inapplicable to the present subject, and much commended by Quintilian. Livia also in Dion says, that great infamy redounds to those, who by anticipation perpetrate the criminal act, which they fear. Now if any one intend no immediate violence, but is found to have formed a conspiracy to destroy me by assassination, or poison, or by false accusation, perjury, or suborned witnesses, I have no right to kill him. For my knowledge of the danger may prevent it. Or even if it were evident that I could not avoid the danger without killing him; this would not establish my right to do so. For there is every presumption that my knowing it will lead me to apply for the legal remedies of prevention.