F. Scott Fitzgerald's marriage to his wife, Zelda, was famously passionate and tempestuous.

"I fell in love with her courage, her sincerity and her flaming self-respect, and it's these things I'd believe in even if the whole world indulged in wild suspicions that she wasn't all she should be." --F. Scott Fitzgerald

In 1958, John Steinbeck wrote a letter to his teenage son, Thomas, who was newly in love with a girl at his boarding school -- and it's chock-full of cute relationship quotes and sage advice.

"Don't worry about losing. If it is right, it happens -- the main thing is not to hurry. Nothing good gets away." --John Steinbeck

Rob Delaney is the co-writer and co-star of the hilarious Amazon series "Catastrophe," which is overflowing with good relationship quotes.

"I can't make you love me, but I can fill my pantry with your favorite snacks." --Rob Delaney

Joan Didion perfectly articulates longing in her memoir "The Year of Magical Thinking."

"A single person is missing for you, and the whole world is empty." --Joan Didion

Oscar Wilde has men -- and women -- pegged in his play "A Woman of No Importance."

"Men always want to be a woman's first love. That is their clumsy vanity. We women have a more subtle instinct about things. What we like is to be a man's last romance." --Oscar Wilde