36 Years Later, Robert De Niro’s Greatest Gangster Movie Quote Is Still One of a Kind

In *Goodfellas*, Robert De Niro’s Jimmy Conway tells young Henry Hill, “Never rat on your friends and always keep your mouth shut.” The article argues that this line captures the film’s central view of gangster loyalty: it sounds like simple advice, but it is also a warning about the rules that control the criminal world.

The moment follows Henry’s arrest for selling untaxed cigarettes; after he stays silent in court, Jimmy gives him cash and praises him for keeping quiet. The article connects the line to Henry’s later experience of the mob’s mix of privilege and danger, including Jimmy’s killings after the Lufthansa heist. De Niro’s calm delivery makes the advice feel credible while hinting at the violence behind it.