Interesting that you use 'good' vs 'positive'. An uncharacteristically selfless/moral act can be positive or negative depending on the person and the context.

Interesting that you use 'good' vs 'positive'. An uncharacteristically selfless/moral act can be positive or negative depending on the person and the context. Take for example a teacher with a history of burnout who one day doesn't go the extra mile for a student. That's uncharacteristic, and morally it's a step down. But given the growth and sustainability curve for a teacher, it's a positive change -- it's normal and expected.