The Wonderful Wizard of Oz

"But that isn't right. The King of Beasts shouldn't be a coward," said the Scarecrow.

"I know it," returned the Lion, wiping a tear from his eye with the tip of his tail. "It is my great sorrow, and makes my life very unhappy. But whenever there is danger, my heart begins to beat fast."

"Perhaps you have heart disease," said the Tin Woodman.

"It may be," said the Lion.

"If you have," continued the Tin Woodman, "you ought to be glad, for it proves you have a heart. For my part, I have no heart; so I cannot have heart disease."

"Perhaps," said the Lion thoughtfully, "if I had no heart I should not be a coward."