But it is also important to recognize how much the themes of the Narnia books are interwoven with what he was thinking and writing in other contexts around the same time, and with material he had already published in the 1940s — as well as the fact that the first seeds of the actual Narnia narrative seem to have been sown as early as 1939. For example: his 1946 book, The Great Divorce, foreshadows many of the ideas in the Narnia stories — most particularly a theme that Lewis insists on more and more as his work develops, the impossibility of forcing any person to accept love and the monumental and excruciating difficulty of receiving love when you are wedded to a certain picture of yourself. It is this theme that emerges most clearly in his last (and greatest) imaginative work, the 1956 novel, Till We Have Faces. The issues we shall be looking at in the following pages are very much the issues that Lewis is trying to work out in a variety of imaginative idioms from the early 1940s onwards — the problems of self-deception above all, the lure of self-dramatizing, the pain and challenge of encounter with divine truthfulness. What Narnia seeks to do, very ambitiously, is to translate these into terms that children can understand. And as to why Lewis decided to address such an audience, there is probably no very decisive answer except that he had a high view of children’s literature, a passion for myth and fantasy and a plain desire to communicate as widely as possible.