Buddhism says we are all connected. What is it that connects us to others?

My own experiences have shown me that we are all the same in experiencing feelings of happiness and sadness. 

At a fundamental level, we are the same in terms of the impressions our life experiences have made upon us.

His Holiness, 17th Gyalwang Karmapa

Ogyen Trinley Dorje

From talk at Root Institute, Bodh Gaya, January 2015