What got CS Lewis through his crisis of faith?

After a debate with a philosopher in 1948, did C. S. Lewis abandon his Christian faith? ... Problem of Pain, Mere Christianity—remain so vastly popular in the Christian world, and continue to sell in Christian book shops, [Lewis] came to feel that their method and ... But did Lewis really have such a mid-career crisis of faith? read more

Some C. S. Lewis scholars have popularized the idea that Lewis had a serious personal crisis after a debate with Elizabeth Anscombe, a Roman Catholic philosopher, at the Oxford Socratic Club on February 2, 1948. read more

His conversion to a robust Christianity required years of intellectual struggle and came only after being convinced that faith was reasonable. The journey of C. S. Lewis, perhaps the greatest defender of the faith of the twentieth century, provides valuable lessons for Christians today in sharing the Gospel with an unbelieving generation. read more

CS Lewis' critique of naturalism is found in On Miracles. There are probably a dozen or more useful quotes from On Miracles. The Abolition of Man also makes a similar argument and is worth reading if you are interested in this. read more