‘In an ideal intellectual exchange, disagreement doesn’t mean tearing down a rival but testing and strengthening the structure of a proposal, an analysis. It is what you do when you agree with people in general but have specifics to work out; and that work can be a joy. It’s anti-evangelical work you go into with an open mind, as willing to be convinced as you are eager to convince. For those inclined that way, this exploration of ideas is an adventure full of the subtle pleasures of expanding meaning and understanding, of going beyond where one started. An idea goes back and forth like a tennis ball, but one that grows and changes with every volley. It’s an arrangement in which no one is the preacher or the choir, in which everything is open to question, in which ideas are beautiful and precision is holy’ (pp. 77-78, ‘Preaching to the Choir,’ 2017).