The song "If Only I Had a Brain" is originally from the 1939 film "The Wizard of Oz," where it was performed by the Scarecrow character, played by Ray Bolger. Harry Connick, Jr. later recorded a cover of the song for his album "20," which was released in 1988. The song revolves around the longing of the Scarecrow, who believes that if he had a brain, he could accomplish great things and be of help to others. He fantasizes about all the things he could do and understand if he possessed a brain. The lyrics express the Scarecrow's desire to acquire knowledge and intelligence. He wishes to be able to unravel riddles, help people in need, and ponder things he has never considered before. The Scarecrow believes that with a brain, he could be as great as Abraham Lincoln. The song also touches upon the Scarecrow's feelings of inadequacy and unworthiness. He feels like a "nothin" with his head filled with "stuffin" (straw) and his heart filled with pain. Despite these self-doubts, he hopes that if he had a brain, he could prove himself deserving and worthy. Overall, the song explores the Scarecrow's longing for intellectual capacity and the belief that it would give him purpose and value. It suggests that intelligence and knowledge are essential qualities for personal growth and the ability to make a meaningful impact on others' lives.