You have to learn the rules of the game. And then you have to play better than anyone else.
Source, in full
An abbreviated version of a quote by California politician Dianne Feinstein, from an interview with Cosmopolitan magazine in October 1985, on the topic of women running for public office. The original was: "... I really do have staying power. That's important for women who run for office. When you get in there and push for a lot of new things all at once and don't get them, you don't just leave. You have to commit, be a team player, learn the rules of the game. And then you have to play it better than anyone else."