John Piper, from the introduction: “Louie Giglio came to my house in 1997, and we sat down at my dining room table. We did not know each other, and he had heard and read some things. He said, ‘I am looking for a person whose whole message revolves around the glory of God in Christ, and you seem to me to be one of those.’

“We talked about Christian Hedonism and the relationship between desiring God on the one hand and God being glorified on the other hand. If you go to their app and look under ‘Who we are,’ they have almost word for word: God is most glorified in us when we are most satisfied in him.

“That’s what unites Louie and me. That’s what the movement is. The movement is not about any particular cause. It is about the fame of Jesus.”