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Heh-heh. Betrayal? Is that noble?
Betrayal is evil; it is, as religious people believe, the worst of sins, for which, according to one author's fiction, a person rests eternally frozen in ice, on the last, ninth circle of Inferno, and I, no matter how much of a blasphemer I am, agree with that.
What could be more pleasant than a stab in the back from a friend? Perhaps, many things. And what could be more unpleasant? I'm not sure.
Betrayal is what breaks a person; betrayal is vile, low, and unsportsmanlike; betrayal is the fate of a weak-willed person who is unable to find honor within himself;
[fanatically] Betrayal, finally, is what almost destroyed the Imperium and killed the Emperor...
Warlord Horus, may his name be cursed forever and ever, who betrayed humanity, being charmed by the deceitful voices of the Warp gods, went against his brothers. He is a traitor, and he is dead. By the hand of the very Emperor who became a god. And so it will be with every cursed xenos, mutant, and heretic who is just waiting to plunge a poisoned dagger into our backs, do you hear?! With every one!!! [/fanatically]