p. 122: 'The universe is so structured that things do not quite work out rightly if men are not diligent in their concern for others. The self cannot be self without other selves. I cannot reach fulfillment without thou. Social psychologists tell us that we cannot truly be persons unless we interact with other persons. All life is interrelated. All men are caught in an inescapable network of mutuality, tied in a single garment of destiny.'