'You shouldn't make jokes,'Alice said,'if it makes you so unhappy.'

-Dodgson
  Alice to the gnat. Through the Looking-Glass, ch.3, 'Looking-Glass Insects'.

Just don't get too complicated Eddie.When a guy gets too complicated he's unhappy. And when he's unhappyöhis luck runs out.

-Chandler, Raymond
  The Blue Dahlia.

Then trust me, there's nothing like drinking So pleasant this side of the grave; It keeps the unhappy from thinking, And makes e'en the valiant more brave.

-Diaz, Porfirio
'Nothing Like Grog'. First published1803.

It is better that some should be unhappy than that none should be happy, which would be the case in a general state of equality.

-Johnson, Samuel known as Dr Johnson
  Remark,7  Apr. Quoted in  James Boswell  The Life of Samuel Johnson (1791), vol.3.

On n'est jamais si malheureux qu'on croit, ni si heureux qu'on espe'  re. One is never as unhappyas one thinks, nor as happy as one hopes.

-La Rochefoucauld, Fran c° ois, 6th Duc de
  Re¤  flexions, ou sentences et maximes morales, no.128.

Men are the only animals who devote themselves assiduously to making one another unhappy. It is, I suppose, one of their godlike qualities.

-Mencken, H(enry) L(ouis)
'Minority Report'. Collected in Notebooks (1956).

You needn't tell me that a man who doesn't love oysters and asparagus and good wines has got a soul, or a stomach either. He's simply got the instinct for being unhappy highly developed.

-Saki pseudonym of  Hector Hugh Munro
The Chronicles of Clovis,'The Match-Maker'.

Was man auch sagen mag, der glu«  cklichsteAugenblick des Glu« c klichen ist doch der seines Einschlafens wie der unglu«  cklichste des Unglu«  cklichen der seines Erwachens. Whatever we may say, the happiest moment of the happy man is that of his falling asleep, just as the unhappiest moment of the unhappy man is that of his awakening.

-Schopenhauer, Arthur
  DieWelt alsWille undVorstellung (TheWorld asWill and Representation), vol.2, ch.46 (translated by E F J Payne).

   Why does my Muse only speak when she is unhappy? She does not, I only listen when I am unhappy When I am happy I live and despise writing For my Muse this cannot but be dispiriting.

-Smith, Stevie (Florence Margaret)
  Selected Poems,'My Muse'.

These unhappy people were proposing schemes for persuading monarchs to choose favourites upon the score of their wisdom, capacity and virtue; of teaching ministers to consult the public good; of rewarding merit, great abilities and eminent services; of instructing princes to know their true interest by placing it on the same foundation with that of their people: of choosing for employment persons qualified to exercise them; with many other wild impossible chimeras, that never entered before into the heart of man to conceive, and confirmed in me the old observation, that there is nothing so extravagant and irrational which some philosophers have not maintained for truth.

-Swift,Jonathan
  Gulliver'sTravels,'A Voyage to Laputa, etc.'ch.6.

   All happy families resemble each other; each unhappy family is unhappy in its own way.

-Tolstoy, Leo Nikolayevich
  Anna Karenina, opening words.