If you have an apple and I have one.We exchange them but I still have one and you too.But if we both feel happy and exchange our feelings,then we have more happiness than before.Happiness is that you have someone to share happiness and sorrow!
When we are happy, we may want our friends to know our happiness. So we talk with them about what happy things happened. Then we could laugh and happy together.
When we are sad, staying silently may be a choice, but a better choice is sharing the worries and troubles with our parents, our friends, our teacher, or even a stranger. This means the sad heart could be filled with sunshine as early as possible.
Each of us is a single part in the world, but we need learn to share.