In "Rainbow Valley," the story reflects on the contrast between past and present. Jem, one of the characters, yearns for the adventurous "brave days of old," a time of heroism and conflict. However, his mother, proud of her sons, finds solace in the fact that such times of struggle and fighting are behind them. She believes that their current peace and safety are blessings to be grateful for.

As Jem dreams of a life filled with battles and glory, his mother cherishes the tranquility of their era. This sentiment underscores a common theme: the desire for adventure clashing with the acceptance of a more peaceful existence. Ultimately, the narrative suggests that while the past may hold allure, the present's safety and security are invaluable.