“Know the joy of life by piling good deed on good deed until no rift or cranny appears between them.”
τί λοιπὸν ἢ ἀπολαύειν τοῦ ζῆν συνάπτοντα ἄλλο ἐπ ἄλλῳ ἀγαθόν, ὥστε μηδὲ τὸ βραχύτατον διάστημα ἀπολείπειν;
XII, 29
Meditations (c. 121–180 AD), Book XII
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Marcus Aurelius 400
Emperor of Ancient Rome 121–180Related quotes

“No good deed goes unpunished.”
Roman Candle (Leticia Baldridge), p. 129 (1956)
Source: This famous quip was first quoted in print by Luce's social secretary Letitia Baldrige in Roman Candle (Houghton Mifflin, Boston, 1956), 129: "When I would entreat her to engage in resolving a specific case, she replied, 'No good deed goes unpunished, Tish, remember that.'" Oscar Wilde, Billy Wilder, and Andrew Mellon have also been cited as sources, but without written evidence.

“We will take the good-will for the deed.”
Source: Gargantua and Pantagruel (1532–1564), Fourth Book (1548, 1552), Chapter 49.

“I know that science and technology are not just cornucopias pouring good deeds out into the world.”
"Why We Need To Understand Science" in The Skeptical Inquirer Vol. 14, Issue 3 (Spring 1990)
Context: I know that science and technology are not just cornucopias pouring good deeds out into the world. Scientists not only conceived nuclear weapons; they also took political leaders by the lapels, arguing that their nation — whichever it happened to be — had to have one first. … There’s a reason people are nervous about science and technology.
And so the image of the mad scientist haunts our world—from Dr. Faust to Dr. Frankenstein to Dr. Strangelove to the white-coated loonies of Saturday morning children’s television. (All this doesn’t inspire budding scientists.) But there’s no way back. We can’t just conclude that science puts too much power into the hands of morally feeble technologists or corrupt, power-crazed politicians and decide to get rid of it. Advances in medicine and agriculture have saved more lives than have been lost in all the wars in history. Advances in transportation, communication, and entertainment have transformed the world. The sword of science is double-edged. Rather, its awesome power forces on all of us, including politicians, a new responsibility — more attention to the long-term consequences of technology, a global and transgenerational perspective, an incentive to avoid easy appeals to nationalism and chauvinism. Mistakes are becoming too expensive.

“A good deed hidden in silence dies.”
Fragment 121; page 387