Every violation of truth is not only a sort of suicide in the liar, but is a stab at the health of human society.
Source: Essays, Prudence (First Series), 1841.
-- Ralph Waldo Emerson, (May 25 1803-1882), US philosopher, poet, essayist; He was the main spokesman of his time for moral optimism and belief in the individual: Self-Reliance, 1844.