People silently struggle from all kinds of terrible things. They suffer from depression, ambition, substance abuse, and pretension. They suffer from family tragedy, Ivy-League educations, and self-loathing. They suffer from failing marriages, physical pain, and publishing. The good thing about politeness is that you can treat these people exactly the same. And then wait to see what happens. You don’t have to have an opinion. You don’t need to make a judgment. I know that doesn’t sound like liberation, because we live and work in an opinion-based economy. But it is.
Experience tells me that I probably will form opinions or make a judgments all of the time, but being polite means I'm not very invested in any of them until I make the conscious decision that it's worth it.