A scene from “Unfinished Business”

Corlys: You've heard of the trouble in the Stepstones?

Daemon: Some Myrish prince is feeding Westerosi sailors to the crabs.

Corlys: I have been petitioning the King to send my navy into the territory, but he's denied me.

Daemon: It was never my brother's strongest trait.

Corlys: What?

Daemon: Being king.

Corlys: The Crabfeeder is backed by powerful entities within the Free Cities who wish to see Westeros weakened. And the King's failures have allowed him to accumulate strength. If those shipping lanes fall, my house will be crippled. And I will not have Driftmark beggared while our King idles himself with feasts and balls and tourneys.

Daemon: I will speak of my brother as I wish. You will not.

Corlys: Waiting in the Stepstones is a chance for you to prove your worth to any who might yet doubt it. We are the realm's second sons, Daemon. Our worth is not given. It must be made.