"Don't think of what's past!" said she. "I am not going to think outside of now. Why should we! Who knows what to-morrow has in store?"
 ~ 
Tess of the D'Urbervilles
 by 
Thomas Hardy
 "I won't think of it now. I can't stand it if I do. I'll think of it tomorrow at Tara. Tomorrow's another day."
 ~ 
Gone With The Wind
 by 
Margaret Mitchell
From the death of each day's hope another hope sprung up to live to-morrow.
 ~ 
The Old Curiosity Shop
 by 
Charles Dickens
To-day we love what to-morrow we hate; to-day we seek what to-morrow we shun; to-day we desire what to-morrow we fear.
 ~ 
Robinson Crusoe
 by 
Daniel Defoe
It was the last weakness he meant to indulge in; and a man never lies with more delicious languor under the influence of a passion than when he has persuaded himself that he shall subdue it to-morrow.
 ~ 
Adam Bede
 by 
George Eliot
"Tomorrow is no man's gift."
 ~ 
The Weavers
 by 
Gilbert Parker
"My advice is, never do tomorrow what you can do today.  Procrastination is the thief of time."
 ~ 
David Copperfield
 by 
Charles Dickens
"Death must be so beautiful.  To lie in the soft brown earth, with the grasses waving above one's head, and listen to silence.  To have no yesterday, and no to-morrow.  To forget time, to forgive life, to be at peace."
 ~ 
The Canterville Ghost
 by 
Oscar Wilde
"Marilla, isn't it nice to think that tomorrow is a new day with no mistakes in it yet?"
 ~ 
Anne of Green Gables
 by 
Lucy Maud Montgomery
"There would have been a time for such a word.  To-morrow, and to-morrow, and to-morrow, creeps in this petty pace from day to day, to the last syllable of recorded time; And all our yesterdays have lighted fools The way to dusty death. Out, out, brief candle! Life's but a walking shadow; a poor player, that struts and frets his hour upon the stage, and then is heard no more: it is a tale told by an idiot, full of sound and fury, signifying nothing."
 ~ 
Macbeth
 by 
William Shakespeare