There is a point in the novel, echoing the murmur of so many people implicated in the terrifying plot behind the holocaust, where one of the SS officials says "I didn't know..."
The detective replies, "Yes you did, you always knew, every time we made a joke about being sent "out east", every time we heard a mother threaten their child with going "up the chimney".
There is an aspect to truth which is unavoidable, steeped into us. I know a truth none of us can avoid, that perhaps one day people will mutter "I didn't know" - and our hearts will break. Romans chapter 1 tells us that it is made plain, Romans 10, quoting Psalm 19, says that the heavens "pour forth speech".
Have we beautiful feet?