Quark: I think I figured out why humans don't like Ferengi—

Sisko: Not now, Quark.

Quark: The way I see it, humans used to be a lot like Ferengi: greedy, acquisitive, interested only in profit. We're a constant reminder of a part of your past you'd like to forget.

Sisko: Quark, we don't have time for this.

Quark: You're overlooking something, Commander. Humans used to be a lot worse than Ferengi. Slavery, concentration camps, interstellar war; we have nothing in our past that approaches that kind of barbarism. You see? We're nothing like you. We're better.