He didn't mention it, but I like this one, which I have seen more frequently. Because liberals tend to love Machiavelli, it can be effective with them. I've had liberals deny its authenticity, so its nice to rub their noses in it.
"When you disarm your subjects, however, you offend them by showing that either from cowardliness or lack of faith, you distrust them; and either conclusion will induce them to hate you. " Niccolo Machiavelli "The Prince"