C.S. Lewis outlines in his final book Letters to Malcolm: Chiefly on Prayer, the struggle of what happens during prayer, and the purpose of the action. The resource provides two sets of questioning. The first furnishes deep textual analysis, and the second aids in class discussion that explores the issues that the text provides. Many questions are complex enough to develop into an essay.  The educator can pick the questions that are best suited for his or her particular class.