Picard: Humankind will change. You must be patient.
Guinan: You know who has the luxury of patience here? Someone who looks like you and not like me. This world had more potential than I had ever imagined. But the hatred here, it never ends, just swaps clothes. This century took off a hood and put on a suit. You say change is coming? Well, it's too damn slow and the cost way too high. And being forced to watch it hurts.
Picard: History's darkest moments can be a tipping point for change. There's still good here.
Guinan: Trust me. It ain't tipping soon. And I've been on this planet a lot longer than you.