In this quote, C.S. Lewis reflects on the conflict between his personal beliefs and the insights he gained from reading. He acknowledges that he overlooked the influence of George MacDonald, whose Christian views shaped his understanding of life. Despite Lewis's reservations about MacDonald's religious beliefs, he recognizes the profound impact MacDonald had on him as a thinker and a writer. This admission reveals a struggle many face between their theoretical frameworks and real-life experiences. It highlights the importance of staying open to new ideas and the possibilities of personal growth through literature. Ultimately, Lewis suggests that embracing contradictions in our beliefs can lead to deeper understandings of ourselves and the world around us.