“Let us consider, for instance, “Sunday neurosis,” that kind of depression which afflicts people who become aware of the lack of content in their lives when the rush of the busy week is over and the void within themselves becomes manifest. Not a few cases of suicide can be traced back to this existential vacuum. Such widespread phenomena as depression, aggression and addiction are not understandable unless we recognize the existential vacuum underlying them. This is also true of the crises of pensioners and aging people.”