I’m reading Marcus Aurelius’s Meditations, and this is one of the passages I really enjoyed.

“Some people, when they do someone a favor, are always looking for a chance to call it in. And some aren’t, but they’re still aware of it—still regard it as a debt. But others don’t even do that. They’re like a vine that produces grapes without looking for anything in return. A horse at the end of the race … A dog when the hunt is over … A bee with its honey stored … And a human being after helping others. They don’t make a fuss about it. They just go on to something else, as the vine looks forward to bearing fruit again in season. We should be like that. Acting almost unconsciously.”

You will find much more joy in serving others when you don’t do it expecting something in return. This is true generosity. You feel it and others feel it when you are keeping score..