Hello. You didn't say which play or book this question refers to, which makes it impossible for me to point out the scenes in which Dillard uses his fingers to emphasize a thought.
However, to try to help you, I can say that you should look for the scenes in which Dillard uses gesticulation along with the argument of adopting unknown religion and ways of life. That's because gesticulation is the action that allows the use of body parts to emphasize a spoken idea.
