I think we should all feel sad, happy, angry in moderation. Our emotions are what make us human, after all. It is when one of those emotions overtakes us for an extended period of time that we need to step back and wonder why we feel the way we do (yes, even in cases of excessive happiness).

It's healthy to feel sad in moderation. Social standard that automatically equate sadness with weakness are unhealthy. For example, in grade school, I was bullied because I showed too much emotion and reacted too sensitively. Why should it be that way?

Sadness is a normal human emotion, yet only "acceptable" in times of grief or universal sorrow. But even if it's private or kept to one's self due to the judgmental world we exist in, it is healthy for us. Like "Inside Out", however, keeping our emotions in moderation is most ideal. It's when one of those emotions overtakes us or when numbness sets in that we must address it.