Bageshwar Dham Sarkar
Why do I feel sad when my neighbour or others are happy?
Sadness at another's joy is ego
Many people are not unhappy because of their own sorrow but because of a neighbour's happiness, and this is a sign of ego. Feeling happy on seeing another's happiness is a sign of a devotee of Bhagwan.
People are not sad about their own sorrow, they are sad seeing the neighbour's happiness. This is a sign of ego, when someone becomes sad seeing another's happiness.