C.S. Lewis on the importance of Theology

From Mere Christianity 
“Everyone has warned me not to tell you what I am going to tell you in this last book. They all say “The ordinary reader does not want Theology: give him plain practical religion.” I have rejected their advice. I do not think the ordinary reader is such a fool. Theology means “The science of God,” and I think any man who wants to think about God at all would like to have the clearest and most accurate ideas about Him which are available. You are not children: why should you be treated like children?”