Final answer:
The text passages describe characters who exhibit resilience and determination, pushing through physical and mental challenges in situations that often involve a matter of life and death.
Step-by-step explanation:
The provided text passages feature individuals who are persevering against difficult situations, often related to survival, where the characters push themselves to their physical limits. This constant struggle and the reference to running until they can go no further suggests themes of endurance, resilience, and the will to survive despite overwhelming odds. Each character is faced with a varied form of adversity: extreme cold, exhaustion, battle wounds, or other dire circumstances, and yet they continue moving forward. The descriptions create vivid imagery of the harrowing experiences and the inner and outer battles these characters endure.