In Ken Kesey's "Sometimes a Great Notion," the metaphor of rain is likened to an old gray aunt, representing something persistent but familiar in life. While the rain may not always be welcomed, it is simply accepted as a part of the seasonal cycle, similar to how one learns to coexist with a relative whose presence is inevitable. This acceptance fosters a sense of patience and adaptability, encouraging individuals to cope with minor inconveniences without becoming overly frustrated.

The perspective shifts from irritation to resilience, highlighting the importance of learning to ignore the annoyances of life. Instead of allowing the gray aunt, or the rain, to overshadow one's mood, the narrative suggests that individuals can train themselves to overlook the dull aspects, maintaining a sense of calm. This approach reinforces a broader theme of embracing life's challenges without letting them dictate one's emotional state, promoting a mindful way of living despite perpetual discomfort.