This quote reminds me of Jesus stooping to write on the ground (John 8) and remaining silent when the Pharisees were trying to trap him in an ethical argument of whether the adulterous woman they brought to him should be stoned for her sin.
“You are most powerful when you are most silent. People never expect silence. They expect words, motion, defense, offense, back and forth. They expect to leap into the fray. They are ready, fists up, words hanging leaping from their mouths. Silence? No.”
~ Alison McGhee