"But you cannot go on "explaining away" forever: you will find that you have explained explanation itself away. You cannot go on "seeking through" things for ever. The whole point of seeing through something is to see something through it. It is good that the window should be transparent, because the street or garden beyond it is opaque. How if you saw through the garden too? ... a wholly transparent world is an invisible world. To "see through" all things is the same as not to see.
C. S. Lewis, The Abolition of Man, p. 48, quoted in Tim Keller, The Reason for God, p. 37.
