I'm saying there is evil in the world," Master Kit said, hefting the box on his...

I'm saying there is evil in the world," Master Kit said, hefting the box on his hip, "and doubt is the weapon that guards against it.
Yardem took the box from the old actor's hands and lifted it to the top of the pile.
"But if you doubt everything," the Tralgu said, "how can anything be justified?"
"Tentatively. And subject to later examination. It seems to me the better question is whether there's any virtue in committing to a permanent and unexamined certainty. I don't believe we can say that.