Diogenes of Sinope, preserved in fragments, insults, and scenes.
Diogenes of Sinope became the most famous face of Cynicism not by leaving behind a tidy philosophical system, but by living his arguments in public. Later writers remembered him as abrasive, shameless, funny, severe, and relentlessly hostile to vanity. Many of the best-known sayings attached to him survive through later collectors rather than through his own surviving books, which is why the exact wording can vary by translation.
That instability is part of the appeal. The historical Diogenes matters because he helped define a tradition of frank speech, radical simplicity, and contempt for social performance. The site you are on borrows only one narrow slice of that legacy: the cutting voice. What follows is a curated set of attributed sayings, each labeled by the ancient source tradition that preserved it.