What Do We Do With Sadness?

In Pixar's "Inside Out" Joy is not really sure why sadness is there. Sadness is seen as a downer. 



Has the North American church adopted the same attitude? We're not quite sure what to do with people that are sad. Do we see sadness as a stumbling block? 
The book of

Lamentations lets us know that sadness isn't a stumbling block, but a necessary feeling in order to get through loss.