Julius Caesar has been one of William shakespeare most well-known plays, and it is often recognised as one of the best sociopolitical dramas ever written. The drama is told from the perspective of Julius Caesar, a Roman former general, and portrays his murder and its plan, as the title indicates.
Julius Caesar was a diplomatic and social genius who destroyed Rome's crumbling political system and installed a dictatorship in its stead. He won the Roman Civil War, but was murdered by people who thought he was gaining too much authority.
I’m guessing that’s “stay gold ponyboy” , which is a play on the phrase “nothing gold can stay”. Johnny is trying to tell pony to stay true to himself and be good.