Spender: I just believe in things that were done. And there were so many things done here. Streets and houses and books and big canals and clocks and places with names - things that were used and touched for centuries. And I don't see how we can ever use them without feeling uncomfortable. Oh, we can change the names, but the old names will still be there. So no matter how we touch Mars, we won't be able to really touch it. See, that'll make us angry. We'll get mad at that and just rip it up. We'll change it to suit ourselves. And ruin it. Like we've ruined Earth.
Col. John Wilder: We're not going to ruin it.
Col. John Wilder: No.
Spender: Us Earthmen have a talent for ruining things. If there are any Martians alive in those hills, they're going to grow to hate us.