I don't think you should support the death penalty to seek revenge. I don't think that's right. I think the reason to support the death penalty is because it saves other people's lives.
Teller contended, not implausibly, that hydrogen bombs keep the peace, or at least prevent thermonuclear war, because the consequences of warfare between nuclear powers are now too dangerous. We haven't had a nuclear war yet, have we? But all such arguments assume that the nuclear-armed nations are and always will be, without exception, rational actors, and that bouts of anger and revenge and madness will never overtake their leaders (or military and secret police officers in charge of nuclear weapons). In the century of Hitler and Stalin, this seems ingenuous.
A wrong is unredressed when retribution overtakes its redresser. It is equally unredressed when the avenger fails to make himself felt as such to him who has done the wrong.
But I won't bore you any longer on the subject of old men. It won't make things any better and all my plans of revenge (such as disconnecting the lamp, shutting the door, hiding his clothes) must be abandoned in order to keep the peace. Oh, I'm becoming so sensible!
Military necessity does not admit of cruelty - that is, the infliction of suffering for the sake of suffering or for revenge, . . . nor of torture to extort confessions.
For one thing is needful: that a human being should attain satisfaction with himself, whether it be by means of this or that poetry or art; only then is a human being at all tolerable to behold. Whoever is dissatisfied with himself is constantly ready for revenge, and we others will be his victims, if only by having to endure his ugly sight.
The nephew revenges himself for this, by holding his breath and terrifying his kinswoman with the dread belief that he has made up his mind to burst. Regardless of whispers and shakes, he swells and becomes discoloured, and yet again swells and becomes discoloured, until the aunt can bear it no longer, but leads him out, with no visible neck, and with his eyes going before him like a prawn's.