“To be happy, make others happy.”
“One of the best ways to make yourself happy is to make other people happy. One of the best ways to make other people happy is to be happy yourself.”
“Whoever is happy will make others happy.”
“Whoever is happy will make others happy too.”
“Make yourself so happy, that by looking at you, other people become happy.”
“Be useful for other, that will make you happy after let people become happy”