In Joseph Conrad's "Heart of Darkness," there is a vivid description of a character's face, comparing it to the unpredictable nature of the autumn sky. This imagery suggests that the character experiences rapid emotional shifts, mirroring how the sky can change from gloomy to radiant within moments. Such a portrayal evokes a sense of complexity and depth, indicating that what lies beneath the surface may be tumultuous and ever-changing.

This metaphor emphasizes the duality of human emotions, capturing the essence of uncertainty and transformation. Just as autumn skies cannot be easily interpreted, the character's feelings fluctuate, highlighting the intricate and often contradictory nature of human experience. The comparison enriches the narrative by inviting readers to reflect on the ephemerality of feelings and the inherent unpredictability of life.