“Hiding from the truth was worse than being lied to.”

Source: A Stir of Echoes

De Profundis (1897)

Source: The Moviegoer

Source: Finnikin of the Rock

Il ne faut pas s’offenser que les autres nous cachent la vérité puisque nous nous la cachons si souvent à nous-mêmes.
Maxim 11 from the Manuscrit de Liancourt.
Later Additions to the Maxims

This appears not to be a Kerouac quote. It has not been found in any of Kerouac's published work.
Misattributed

Lectures XIV and XV, "The Value of Saintliness"
1900s, The Varieties of Religious Experience (1902)

Concerning right-wing radio shortly before the 2004 U.S. Presidential Election, in NOW (17 December 2004) http://www.pbs.org/now/transcript/transcript351_full.html
Context: On the eve of the election last month my wife Judith and I were driving home late in the afternoon and turned on the radio for the traffic and weather. What we instantly got was a freak show of political pornography: lies, distortions, and half-truths — half-truths being perhaps the blackest of all lies. They paraded before us as informed opinion.