Sharing Happiness is more important than sharing Sadness.
Sharing has a double effect: it decreases sadness and increases happiness!
You share everything with everybody and everybody shares everything with you. Just out of love. In this case the source is love, not ego. When you want to share your happiness with others and want to share other peoples’ pain, sharing is a great and positive thing.
In western culture sharing is not important. People divide and own. This is mine and that is yours. This is my car; that is your house. It is the ego of owning something. There is too much individuality. Share with others!