C.S. Lewis's writing was influenced by a blend of Christian theology, classical literature, and personal experiences, including his childhood in Ireland and the impact of World War I. His friendships with other literary figures, such as J.R.R. Tolkien, also played a crucial role in shaping his thoughts on faith and imagination. Lewis's deep engagement with philosophical issues and his conversion to Christianity further enriched his narratives, making them resonate with themes of morality, redemption, and the struggle between good and evil, which continue to captivate readers.