In Philip K. Dick's "The Man in the High Castle," the quote reflects a transition from innocence to maturity. It suggests a journey where one moves away from the simplistic thoughts and beliefs of childhood, embracing a more analytical and scientific approach to understanding the world. This shift signifies personal growth and a deeper awareness of reality, as individuals learn to navigate complexities beyond their early perceptions.

This theme resonates throughout the narrative, where characters confront challenging moral and existential dilemmas. By 'putting away childish things,' they are urged to engage with a more critical viewpoint, highlighting the necessity of adopting reason and rationality in a world filled with uncertainty and conflict. It underscores the importance of evolving one's mindset in response to the complexities of adult life.