4 Ways Sadness May Be Good For You

Evolutionary theory suggests that we should embrace all of our emotions, as each has an important role to play under the right circumstances. So, though you may seek ways to increase happiness, don't haphazardly push away your sadness. No doubt, it's there for good reason, as research suggests that mild, temporary states of sadness may actually be beneficial in handling various aspects of our lives.

http://www.dailygood.org/story/793/4-ways-sadness-can-be-good-for-you-joseph-p-forgas/