"....but I suspect that Ireland is important because it belongs to me." In context, one of Stephen's more arrogant, yet weirdly awesome moments. Hell, Stephen's whole drunken rage against the British soldiers is a great Refuge In Audacity Moment subverted in that he ends up falling on his face and having to be rescued by Bloom, but still.
The scene in the pub in "Cyclopes" where eternal doormat Nice Guy Bloom finally stands up to the anti-semites and publicly admits to being a Jew in front of everybody. The first scene in the whole book where Bloom shows real backbone.
The last such scene takes place between the second-last and last chapters: Bloom has asked Molly to bring him breakfast in bed the next morning, instead of (as is usual) the other way round. Molly's interior monologue starts with her mulling over this request.
The whole damn novel is one crowning moment of awesome for Joyce, who utilizes and parodies (sometimes affectionately sometimes not) so many styles of writing that the novel itself is an Odyssey tracing several hundreds years of the literary discourse.