Aw, come on... We've been doing this dance for a while, right? So we've established some conversation. No doubt the Bad Guy has explained his purpose to me, probably dabbling in the rhetoric occasionally.
So, I would purposfully misquote him, in a way that presents an idea opposite to his or, preferably, use a full quote in a way that would let his death add new meaning.
So, like...
"Prepare for trouble! Make it double!", which meant "Prepare yourself for some adversity, and now do it again in a way that compounds the original value", becomes, I don't know, "Prepare for a bullet, and then prepare for Hell". Only if the person is specifically religious, in this case, but you get the idea.