 The most important thing we need to know about Lewis is he despised modernism as what he called Christianity and water. Modernism and the theological understanding of the word is that the church and Christianity needs to move with the tithes. It needs to keep up with the tithes. It has to be relevant to whatever is fashionable. This was anathema to Lewis as it's anathema to all people who believe in orthodoxy, because as G.K. Chesterton said, we don't want a church that will move with the world. We want a church that will move the world. And that's the difference between the two. You have to have a church that's governed by the Holy Spirit, not governed by the spirit of the age. Lewis and Chesterton were on the same page in this, absolutely. So no Christianity in water, no diluting of the purity of the spirit with the spirit of the age.