Okay, so diving into Cicero's stuff about justice always gets me thinking about 'De Officiis'. That whole thing about "the foundation of justice is good faith"—the Latin's 'fides', right? Not just keeping promises, but this deeper reliability. It's the bedrock. But honestly, the one I scribbled in a notebook years ago and still think about is from 'De Republica': "The good of the people is the chief law." 'Salus populi suprema lex esto.' It cuts through all the abstract talk about laws and puts morality right there in the street, in what actually helps folks live decent lives. It's practical, not just theoretical.
Then there's the line from 'De Legibus': "The law is right reason in agreement with nature." When I hit a rough patch at work last year, that one kept floating back. It separates justice from just… rules. A bad rule isn't really law if it's against that natural reason. Makes you question everything, which is the point, I guess. The morality quotes aren't the flashy ones, they're the ones that build a system. They're slow, structural.