"Why do we call all our generous ideas illusions, and the mean ones truths?"
 ~ 
The House of Mirth
 by 
Edith Wharton
Seldom, very seldom, does complete truth belong to any human disclosure; seldom can it happen that something is not a little disguised, or a little mistaken.
 ~ 
Emma
 by 
Jane Austen
"Truth is like a thrashing-machine; tender sensibilities must keep out of the way."
 ~ 
The Confidence-Man
 by 
Herman Melville
Truth uncompromisingly told will always have its ragged edges.
 ~ 
Billy Budd
 by 
Herman Melville
Something unpleasant is coming when men are anxious to tell the truth.
 ~ 
The Young Duke
 by 
Benjamin Disraeli
After all, the true seeing is within.
 ~ 
Middlemarch
 by 
George Eliot
The soul, fortunately, has an interpreter–often an unconscious, but still a truthful interpreter–in the eye.
 ~ 
Jane Eyre
 by 
Charlotte Bronte
It may, indeed, be assumed that a man who loses his temper while he is speaking is endeavouring to speak the truth such as he believes it to be, and again it may be assumed that a man who speaks constantly without losing his temper is not always entitled to the same implicit faith.
 ~ 
Phineas Redux
 by 
Anthony Trollope
You'll find truth in your looking glass, not on the tongues of men.
 ~ 
A Feast for Crows
 by 
George R. R. Martin
One voice may speak you false, but in many there is always truth to be found.
 ~ 
A Storm of Swords
 by 
George R. R. Martin