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“There ain't no such thing as a free lunch.”
― Pierre Dos Utt, Tanstaafl: A Plan for a New Economic World Order

“Oh, "Tanstaafl." Means "There ain't no such thing as a free lunch." And isn't,' I added, pointing to a FREE LUNCH sign across room, 'or these drinks would cost half as much. Was reminding her that anything free costs twice as much in long run or turns out worthless.”
― Robert A. Heinlein, The Moon Is a Harsh Mistress

“There is no such thing as getting more than you put into anything.”
― Kimon Nicolaides, The Natural Way to Draw