Introduction: the purpose of life -- Regret -- Meaning -- Fear -- Ageism -- Joy -- Authority -- Transformation -- Newness -- Accomplishment -- Possibility -- Adjustment -- Fulfillment -- Mystery -- Relationships -- Tale-telling -- Letting go -- Learning -- Religion -- Freedom -- Success -- Time -- Wisdom -- Sadness -- Dreams -- Limitations -- Solitude -- Productivity -- Memories -- Future -- Agelessness -- Immediacy -- Nostalgia -- Spirituality -- Loneliness -- Forgiveness -- Outreach -- The present -- Appreciation -- Faith -- Legacy -- Afterword: the twilight time