In Susan Cooper's "The Grey King," a significant quote highlights the symbolism of three animals representing wisdom and strength. The Owl of Cwm Cawlwyd embodies knowledge and insight, while the Eagle of Gwernabwy symbolizes power and a lofty perspective. Lastly, the Blackbird of Celli Gadarn brings forth themes of resilience and adaptability.

This trio represents the essential qualities needed to navigate challenges in life. Together, they form a council of sorts, offering guidance and support to the characters as they face their struggles. Their distinct traits reflect the importance of embracing different strengths in overcoming obstacles and achieving harmony.