“The great malady of public life is cowardice. Most men are not untrue, but they are afraid. Most of the errors of public life, if my observation is to be trusted, come not because men are morally bad, but because they are afraid of somebody. God knows why they should be: it is generally shadows they are afraid of.”

2000-09, Truth to Power, 2008

Usher II (1950)
The Martian Chronicles (1950)
Source: Fahrenheit 451
Context: They began by controlling books of cartoons and then detective books and, of course, films, one way or another, one group or another, political bias, religious prejudice, union pressures; there was always a minority afraid of something, and a great majority afraid of the dark, afraid of the future, afraid of the past, afraid of the present, afraid of themselves and shadows of themselves.

Source: Witch & Wizard

This quotation, often attributed on the Internet to Plato, cannot be found in any of Plato's writings, nor can it be found in any published work anywhere until recent years. If it really were a quotation by Plato, then some author in the recorded literature of the last several centuries would have mentioned that quote, but they did not. The sentiment isn't new, however. The ancient Roman Seneca, in his work on "Morals," quoted an earlier Roman writer, Lucretius (who wrote about the year 50 B.C.), as saying "we are as much afraid in the light as children in the dark." (Seneca was paraphrasing a longer passage by Lucretius from De Rerum Natura (On the Nature of Things), Book II, lines 56 et seq.)
Misattributed

Plato, Phaedo

Ann Richards Discusses Texas, Politics and Humor on Larry King Live http://edition.cnn.com/TRANSCRIPTS/0101/23/lkl.00.html, CNN, January 23 2001
2001

Source: Archangel

Source: The Godfather