Journalists saya thing that they know isn't true, in the hope that if they keep on saying it long enough it will be true.

-Bennett, (Enoch) Arnold
  The Title, act 2.

Journalists as a group, unlike all other powerful groups, require some protection from themselves, and from their own excesses.

-Black (of Crossharbour), Conrad Black, Baron
  Speech,  Annual Dinner of the Canadian Press, 20  Apr, reported in the Globe and Mail the following day.

It is no good saying we [journalists] must report only what is true because what is true cannot always be proven.

-Humphrys,John
  In the Sunday Times, 8 Feb.

  How is the world ruled and led to war? Diplomats lie to journalists and believe these lies when they see them in print.

-Kraus, Karl
Aphorism collected in Heinrich Fischer (ed) Beim Wort genommen (1955). Translated by Harry Zohn in Half-truths and one-and-a-half truths (1986).