With any actor, if you know your character well enough, you'll know pretty much what he would say under any circumstance, or whatever situation might rear its head.
“None of us know all the potentialities that slumber in the spirit of the population, or all the ways in which that population can surprise us when there is the right interplay of events.”
“Everyone makes pesto in a food processor. But the texture is better with a mortar and pestle, and it's just as fast.”