1. ... gratefulness is an attitude that underlies successful functioning over the life course.
Character Strengths and Virtues: A Handbook and Classification
2. Of course, perseverance does not guarantee success, but success is often unattainable without it.
Character Strengths and Virtues: A Handbook and Classification
3. ... Nix et al. (1999) showed in experimental studies that whereas task success can produce happiness, only success at autonomously motivated tasks maintained or enhanced vitality. Finally, in new research, Bernstein and Ryan (2001) argued that subjective vitality can be affected by contact with nature.
Character Strengths and Virtues: A Handbook and Classification
