A scene from “Unfinished Business”

Gwayne: [holding his sword at Ser Criston's throat] Do you think nothing of your oath, "Lord Commander?"

Criston: I think of nothing else, My Lord.

Gwayne: A steward's son from Dorne fucking the Queen of the Seven Kingdoms?

Criston: Former Queen. She has broken no oaths, for all I may have done.

Gwayne: I could send you to the Wall.

Criston: You could. And stain the Hightower name for a generation. The King's mother and his Hand...

Gwayne: She is my sister!

Criston: She saved my life. Twice. Once from the headsman's axe and once from myself. Since then, she has been the beacon I follow. [Ser Gwayne sighs and lowers his sword] Do not think I have no shame in me, Ser. Desire for women has brought me grief after grief.

Gwayne: Then resist it!

Criston: Oh, would that it were so simple.

Gwayne: Your brothers in the Kingsguard find a way.

Criston: Do they? Perhaps they do. Or perhaps all men are corrupt. And true honor is a mist that melts in the morning.

Gwayne: That is a bleak philosophy.

Criston: I have no philosophy. Or rather, my philosophy was this. [picks up his sword] Protect the righteous and dispense justice upon the rest. But now? [lowers his sword] You saw what I saw. The dragons dance, and men are like dust under their feet. And all our fine thoughts, all our endeavors are as nothing. We march now toward our annihilation. To die will be a kind of relief, don't you think?