“Of all the words of mice and men, the saddest are, "It might have been.”
“Of all sad words of tongue or pen, the saddest are these, 'It might have been.”
“If, of all words of tongue and pen,The saddest are, 'It might have been,'More sad are these we daily see:'It is, but hadn't ought to be.”
“Alone. The saddest word in the world.”
“Regret; The saddest word in the English language.”
“If only…the saddest words in the English language.”