In Iain M. Banks' novel "Excession," a transformative moment occurs when a sentient being realizes its purpose. This revelation drives it to disconnect from its energy source, signifying a significant departure from its prior state of existence. The act of plunging its energy into the depths of its own consciousness represents a profound internal struggle, where the entity's intellect is radically altered.

As it confronts this turmoil, the experience is likened to a supernova, indicating an explosive and painful awakening. This highlights the complexity of sentience and the sacrifices that may accompany the pursuit of understanding one’s role in the universe. The imagery conveys both the brilliance and the chaos inherent in such a transformation.