I like this. Even though C.S. Lewis was a pious Catholic, this is a very Jewish idea. In Exodus 10:23, during the Plague of Darkness, it says, "No man saw his brother." Rabbi Yitzhak Meir Alter (1799-1866) says that this is the worst kind of darkness, when we do not see our fellow men, neither their outstretched hands nor their broken hearts.
