1. Epigraph
a quote or statement before the beginning of a piece of literature that highlights a main idea or theme in the piece to follow. It can be used to draw a reader's attention to a certain idea or concept, or to help set the mood of the piece.

2. Behind every great fortune there is a crime. — Balzac
(from The Godfather by Mario Puzo)

3. Did I request thee, Maker, from my clay
To mould me Man, did I solicit thee
From darkness to promote me?
— Paradise Lost, X,
(from Frankenstein by Mary Shelley)

4. Lawyers, I suppose, were children once. — Charles Lamb
(To Kill a Mockingbird by Harper Lee)

5. (from The Great Gatsby by F. Scott Fitzgerald)
Then wear the gold hat, if that will move her; If you can bounce high, bounce for her too, Till she cry “Lover, gold-hatted, high-bouncing lover, I must have you!” — Thomas Parke D’Invilliers
(from The Great Gatsby by F. Scott Fitzgerald)