My experience with both my parents is that grief has a lot of down sad things but I was also really emotionally raw in the first year after each of them passed. Flowers smelled more intensely my relationships were hotter and I was more willing to risk. I was going for it a lot more. I was 'unsober' and I wasn't playing by my rules.
Since narcissism is fueled by a greater need to be admired than to be liked psychologists might use that fact as a therapeutic lever - stressing to patients that being known as a narcissist will actually cause them to lose the respect and social status they crave.