“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.”
Hays translation
A man makes no noise over a good deed, but passes on to another as a vine to bear grapes again in season.
V, 6
Meditations (c. 121–180 AD), Book V
Help us to complete the source, original and additional information
Marcus Aurelius 400
Emperor of Ancient Rome 121–180Related quotes

As quoted in Getting Personal: Theodore Gray http://www.news-gazette.com/news/local/2013-02-10/getting-personal-theodore-gray.html
“Hoping is what people do when they're too lazy to do anything else.”
Part 5, section 19 - p.175
Novels, Cloudstreet (1991)

“I looked like this when I was young, and I still do.”
What Time Is It? You Mean Now?: Advice for Life from the Zennest Master of Them All, Simon and Schuster, 2003, ISBN 0743237684
Yogiisms