“One should always play fairly when one has the winning cards.”

Source: The Book Thief

Source: The Secret Life of CeeCee Wilkes

The World, ii
The Note-Books of Samuel Butler (1912), Part I - Lord, What is Man?

Attributed without citation in "Tigran Petrosian's Best Games" http://www.chessgames.com/perl/chesscollection?cid=1014968 at chessgames.com

Pg 40-41
Becoming A Barbarian (2016)

Parerga and Paralipomena (1851), Not yet placed by volume, chapter or section

Source: Tiny Beautiful Things: Advice on Love and Life from Dear Sugar

The Abolition of Work (1985)
Context: No one can say what would result from unleashing the creative power stultified by work. Anything can happen. The tiresome debater's problem of freedom vs. necessity, with its theological overtones, resolves itself practically once the production of use-values is co-extensive with the consumption of delightful play activity. Life will become a game, or rather many games, but not—as it is now — a zero/sum game. An optimal sexual encounter is the paradigm of productive play. The participants potentiate each other's pleasures, nobody keeps score, and everybody wins. The more you give, the more you get. In the ludic life, the best of sex will diffuse into the better part of daily life. Generalized play leads to the libidinization of life. Sex, in turn, can become less urgent and desperate, more playful.
If we play our cards right, we can all get more out of life than we put into it; but only if we play for keeps.
No one should ever work.
Workers of the world... relax! </center