A sick society must think much about politics, as a sick man must think much about his digestion; to ignore the subject may be fatal cowardice for the one as for the other. But if either comes to regard it as the natural food of the mind—if either forgets that we think of such things only in order to be able to think of something else—then what was undertaken for the sake of health has become itself a new and deadly disease.

C.S. Lewis, Membership, in The Weight of Glory