Geez, people. Look a little deeper. There is a similar moment in the Swordmeeting:
Compare:
Vivec
But surely that same history records my role in the Armistace, specifically those measures whereupon Septim was granted the Numidium?
Well...yes.
Vivec
I rest my case.
With:
"What?" Cyrus said. "The Emperor? I didn't kill him."
"Of course you did; you were the Hoon Ding."
"No I didn't and no I wasn't."
The young ansu refused to listen. Behind his stone-feather mask he smiled in admiration. "You disarmed him, even, and would not kill him until he showed another knife. That is ra gada honor. We do not fight the unprotected. Your stories have come?€”"
"That wasn't the Emperor," Cyrus said. "That was just..."
"Of course it was. That is why the Hammerfell stands. You were the Hoon Ding. In any case, the Ansu-Gurleht cannot be beaten. He was gifted by the Barons of Move Like This, who record sword moves from the future, as well."
My interpretation: "If you meet the Buddha on the road, kill him," is a common Zen koan. The literal meaning is shocking, but one shouldn't question the morality, but the intent, especially in the words "Buddha", "road" and "kill".
The phrase comes close to this tidbit from the Sermons:
"Embrace the art of the people and marry it and by that I mean secretly have it murdered.
The ruling king that sees in another his equivalent rules nothing. "
Vivec, then, was "killing" the emperor, not by violence, as Cyrus did when winning his battle but losing the war, but by submission. And in the end, he deferred an active participation in that metaphysical struggle onto someone else.