"The line between good and evil runs not through states, nor between classes, nor between political parties -- but right through every human heart -- and through all human hearts. This line shifts. Inside us, it oscillates with the years. And even within hearts overwhelmed by evil, one small bridgehead of good is retained. And even in the best of all hearts, there remains... an un-uprooted small corner of evil." - Aleksandr Solzhenitsyn, Gulag Archipelago
When I approach conversations with people, I think about the above passage a lot. It humbles me and it gives me hope.