In "The Horse and His Boy" by C.S. Lewis, the phrase "Onward and Upward! To Narnia and the North!" reflects a spirit of adventure and courage. The characters embark on a journey filled with hope and determination, illustrating their desire to reach a better place. This emphasizes the themes of bravery and the pursuit of one's destiny within the story.

The quote encapsulates the essence of the characters' quest, leading them toward Narnia, a land of wonder and discovery. It serves as a motivational rallying call, inspiring them to overcome obstacles and strive for a brighter future, making it a significant moment in their narrative journey.