"The Little Engine That Could" is not a song by John Denver, but rather a children's story written by Watty Piper. However, I can help you explain the meaning and story behind the lyrics you provided. The lyrics describe a little railroad train filled with toys on a journey to find homes with children. The train has a determined and positive attitude, singing about feeling good and going its merry way. However, the train encounters a large mountain that it struggles to climb. Despite its efforts, it becomes weary and believes it cannot continue. The toys on the train try to help push it up the mountain, but they fail. Then, a big engine arrives but refuses to assist them, looking down on their plea for help. Finally, the smallest engine arrives, and despite its size and apparent limitations, it decides to tackle the challenge. It connects to the front of the train and sings a song about believing in itself. With determination and a positive mindset, the little engine successfully pulls the train up the mountain. The story teaches the lesson of perseverance and the power of positive thinking. It encourages individuals to believe in themselves and their abilities, no matter the obstacles they face. Please note that if you are looking for the explanation of John Denver's songs or lyrics, I can provide help with specific songs written by him.