You probably have heard of these amazing studies which show that when you are given, let's say, 20 dollars, and you're asked to spend it on yourself or give it in the service of someone else, gifted to someone else, the circuits in your brain that show you did the right thing, these reward circuits driven by a transmitter called dopamine, they get active when you give to someone else, which goes along with the study that when you give in service of other people, you're actually happier yourself.