CS Lewis is considered one of the most prominent Christian apologists of the twentieth century. But he held a deep distrust of the work of the rational faculty that was not properly oriented by the imagination, which explains in large part his turn to writing imaginative fiction later in his life. Through his fiction Lewis was trying to demonstrate, rather than rationally explain, what the world would look like if Christianity and a broader moral worldview were true. Lewis explains this understanding of the imagination and its importance for right thinking in a variety of essays and in his two most profound books, The Abolition of Man and The Discarded Image. This chapter examines the arguments Lewis makes and the metaphors he uses in these works to demonstrate how the foremost Christian apologist of the twentieth century prioritized the imaginative faculty over the rational.