My dear Wormwood,

"You see, it is so hard for these creatures to persevere. The routine of adversity, the gradual decay of youthful loves and youthful hopes, the quiet despair (hardly felt as pain) of overcoming the chronic temptations with which we have again and again defeated them, the drabness which we create in their lives and the inarticulate resentment with which we teach them to respond to it - all this provides admirable opportunities of wearing out a soul by attrition ... So inveterate is their appetite for Heaven that our best method, at this stage, of attaching them to earth is to make them believe that earth can be turned into Heaven at some future date by politics or eugenics or 'science' or psychology or what not."