On the Hapiness of Others

Happiness and laughter is contagious. The happiness of others often make us happy. Strange that sometimes the happiness of others however can lead to other emotions such as sadness and anger. These situations do occur hopefully less frequently than being happy for others. But maybe the few difficult times of being happy for other people stems from a sense of selfishness or jealousy. The sadness felt at others' happiness however is an interesting thought. I think it stems from a feeling of being left behind by that person as they maybe have succeeded at something and you do not feel the same sense of success behind it and maybe a pressure to be as successful.