It is a good thing to sacrifice your happiness for the desires of others.

Agree because if you give away your happiness to a friend of yours that is sad they’ll probably give away their happiness too. Also you don’t lose anything if give away just a bit of your happiness to others. Like if a poor kid with his mom asks for money (1 euro, 2 euro’s) you should give some for them because you’ll make then feel happy and that’s what you want them to feel.