Developing Positive Qualities and Diminishing Negative Qualities

I wondered recently whether the ideas of developing positive qualities and abandoning negative qualities are different. To me, it seems developing positive qualities requires an active effort, a type of striving. In contrast, abandoning negative qualities requires a relinquishing, a restraint. **Are these endeavours two different aspirations? Does achieving one ascertain the achievement of the other or not?** In other words, does one lead automatically to the other, or should one *intentionally* implement both?