Positive, adj. Mistaken at the top of one's voice.

-Bierce, Ambrose Gwinett
  The Cynic's Word Book. Retitled  The Devil's Dictionary (1911).

What Chekhov saw in our failure to communicate was something positive and precious: the private silence in which we live, and which enables us to endure our own solitude.

-Pritchett, Sir V(ictor) S(awdon)
  The Myth Makers,'Chekhov'.

Alle Befriedigung, oder was man gemeinhin Glu«  ck nennt, ist eigentlich und wesentlich immer nur negativ und durchaus nie positiv. All satisfaction, or what iscommonlycalled happiness, is really and essentially always negative only, and never positive.

-Schopenhauer, Arthur
  DieWelt alsWille undVorstellung (TheWorld asWill and Representation), vol.1, bk.4, ch.58 (translated by E F J Payne).