Thomas Aquinas, if taken in a right sense, has justly observed, that in actual self-defence no man can be said to be purposely killed. Indeed, it may some times happen that there is no other way for a person to save himself, than by designedly doing an act, by which the death of an aggressor must inevitably ensue. Yet here the death of any one was not the primary object intended, but employed as the only means of security, which the moment supplied. Still it is better for the party assaulted, if he can safely do it, to repel or disable the aggressor than to shed his blood. V. The danger must be immediate, which is one necessary point. Though it must be confessed, that when an assailant seizes any weapon with an apparent intention to kill me I have a right to anticipate and prevent the danger. For in the moral as well as the natural system of things, there is no point without some breadth. But they are themselves much mistaken, and mislead others, who maintain that any degree of fear ought to be a ground for killing another, to prevent his SUPPOSED intention. It is a very just observation made by Cicero in his first book of Offices, that many wrongs proceed from fear; as when the person, who intends to hurt another, apprehends some danger to himself unless he took that method. Clearchus, in Xenophon, says, I have known some men, who partly through misrepresentation, and partly through suspicion, dreading one another, in order to prevent the supposed intentions of their adversaries, have committed the most enormous cruelties against those who neither designed, nor wished them any harm.