This paper aims to reconstruct Arendt's ethics of worldliness from her specific way of thinking about the world and how judging an action takes place in it. For Arendt, by thinking we show our responsibility for the world into which we are thrown. In judging a political action we are directed by ethical constraints to come from the world itself and the verdict of spectators. That means, when we judge we should be aware of the things that an action could bring to the public realm and what others might say about it.