Fair speech may hide a foul heart.
 ~ 
The Two Towers
 by 
J. R. R. Tolkien
"What does the brain matter," said Lady Rosseter, getting up, "compared with the heart?"
 ~ 
Mrs. Dalloway
 by 
Virginia Woolf
No tear dropped over that pillow; in such straits as these, the heart has no tears to give,—it drops only blood, bleeding itself away in silence.
 ~ 
Uncle Tom's Cabin
 by 
Harriet Beecher Stowe
Of course, in a novel, people's hearts break, and they die, and that is the end of it; and in a story this is very convenient. But in real life we do not die when all that makes life bright dies to us.
 ~ 
Uncle Tom's Cabin
 by 
Harriet Beecher Stowe
Saturday morning was come, and all the summer world was bright and fresh, and brimming with life. There was a song in every heart; and if the heart was young the music issued at the lips. There was cheer in every face and a spring in every step.
 ~ 
The Adventures of Tom Sawyer
 by 
Mark Twain
"Oh! I have a heart to be stabbed in or shot in, I have no doubt," said Estella, "and of course if it ceased to beat I should cease to be. But you know what I mean. I have no softness there, no—sympathy—sentiment—nonsense."
 ~ 
Great Expectations
 by 
Charles Dickens
It is not possible to know how far the influence of any amiable honest-hearted duty-doing man flies out into the world; but it is very possible to know how it has touched one's self in going by.
 ~ 
Great Expectations
 by 
Charles Dickens
My tongue will tell the anger of my heart,
Or else my heart, concealing it, will break.
 ~ 
The Taming of the Shrew
 by 
William Shakespeare
There are very few of us who have heart enough to be really in love without encouragement.
 ~ 
Pride and Prejudice
 by 
Jane Austen
"Did my heart love till now? forswear it, sight!
For I ne'er saw true beauty till this night."
 ~ 
Romeo and Juliet
 by 
William Shakespeare