@DrDanMarshall @nonehitwonder
I believe it's something along the lines of if someone insults you and it's false then you shouldn't care because it's not true, and if it's true then you shouldn't care because there's no reason to be upset over a true statement.
@Radical_EgoCom @nonehitwonder Roughly, yes, but the version I heard makes more room for emotion. If somebody says something false about you, laugh at their idiocy, and trust that enough people are wise enough to see the truth that this falsehood will not hurt you. (Admittedly, if the idiot has power over you, their idiocy can be a danger to you.)