In "The Glass Castle" by Jeannette Walls, the author illustrates a struggle with conflicting emotions. Positive thoughts often give way to a tide of negativity, leaving her feeling overwhelmed. The imagery of negative thoughts as a flock of black crows captures the heaviness and despair that can invade one's mind, symbolizing the weight of those gloomy feelings.

This analogy emphasizes how pervasive and intrusive negative thoughts can become, much like a swarm of crows that fills the landscape. They settle silently, looming ominously, reflecting the internal turmoil experienced during difficult times. Walls' writing skillfully conveys this complex emotional landscape, revealing how mental struggles can dominate one's life.