In C.S. Lewis's "Surprised by Joy: The Shape of My Early Life," he emphasizes the importance of careful reading for those who identify as atheists. The young man seeking to maintain his atheism must be vigilant and discerning about the materials he engages with, as they can influence his thoughts and beliefs significantly.
This caution reflects Lewis's understanding of the power of literature and ideas in shaping one's worldview. By being selective in what he reads, an atheist can guard against the subconscious influences that might challenge his convictions and open him up to new perspectives.