How we cite our quotes: All quotations are from Star Wars: A New Hope.
Quote #4
LUKE: They're going to execute her. Look, a few minutes ago, you said you didn't want to just wait here to be captured. Now all you want to do is stay?
HAN: Marching into the detention area is not what I had in mind.
LUKE: But they're gonna kill her!
HAN: Better her than me.
LUKE: She's rich.
HAN: Rich?
LUKE: Mm-hmm. Rich, powerful. Listen if you were to rescue her, the reward would be—
HAN: What?
LUKE: Well, more wealth than you can imagine.
HAN: I don't know. I can imagine quite a bit.
Han is a courageous guy. Granted, he needs a motivational paycheck to get him going—who amongst us doesn't sometimes?—but his courage allows him to stand up to the Empire where others won't.
Quote #5
LUKE: Come on. Why don't you take a look around? You know what's about to happen, what they're up against. They could use a good pilot like you. You're turning your back on them.
HAN: What good's a reward if you ain't around to use it? Besides, attacking that battle station ain't my idea of courage. It's more like… suicide.
LUKE: All right. Take care of yourself, Han. I guess that's what you're best at, isn't it?
Han's self-centered priorities get the better of him, and he decides that attacking the Death Star head-on might tap his courage reserves.
Quote #6
WEDGE: I'm hit! I can't stay with you!
LUKE: Get clear, Wedge. You can't do any more good back there.
WEDGE: Sorry.
DARTH VADER: Let him go. Stay on the leader.
Three cheers for the courage of the Rebels in this film. Like most characters who oppose the Empire, they've got courage in spades as evidenced by their willingness to assault the Death Star. Han was right; it was a suicide mission since only Wedge and Luke survive, but they went anyway.