The Wizard of Oz by Lynam Frank Baum Chapter 5 Page 14

and I was left to stand in the woods until you came to help me.

It was a terrible thing to undergo, but during the year I stood there I had time to think that the greatest loss I had known was the loss of my heart. While I was in love I was the happiest man on earth; but no one can love who has not a heart, and so I am resolved to ask Oz to give me one. If he does, I will go back to the Munchkin maiden and marry her.”

Both Dorothy and the Scarecrow had been greatly interested in the story of the Tin Woodman, and now they knew why he was so anxious to get a new heart.

“All the same,” said the Scarecrow, “I shall ask for brains instead of a heart; for a fool would not know what to do with a heart if he had one.”