For Carl Jung, the shadow is an essential aspect of the human psyche. It refers to the unconscious, repressed aspects of an individual's personality, including qualities, traits, and impulses that the person finds unacceptable or shameful.
According to Jung, the shadow represents the parts of ourselves that we try to deny or hide from the world, and that we may even be unaware of. These could be negative qualities, such as anger, envy, or greed, or positive qualities that we feel uncomfortable expressing, such as creativity or sexuality. The shadow may also contain elements of our personal and collective history that we try to repress or ignore.
Jung believed that acknowledging and integrating the shadow into our conscious awareness is crucial for achieving individuation, or the process of becoming a fully integrated and self-aware individual. By acknowledging and working with our shadow, we can gain a greater understanding of ourselves, and learn to accept and integrate all aspects of our personality.