Is Being Selfish, a Key to Happiness?

One does derive happiness when one has a successful personal relationship, or gets a good promotion at the workplace, or their daughter stands first in school, etc. However, when one chooses selfishness as the ingredient to derive personal happiness, such happiness does not last long! Even while things outside are happy and merry, the fire of selfishness in such a being constantly keeps burning him inside, making him feel only unhappy.

Is Being Selfish, a Key to Happiness?
One does derive happiness when one has a successful personal relationship, or gets a good promotion at the workplace, or their daughter stands first in school, etc. However, when one chooses selfishness as the ingredient to derive personal happiness, such happiness does not last long! Even while things outside are happy and merry, the fire of selfishness in such a being constantly keeps burning him inside, making him feel only unhappy.