"Helping someone else is the best way to ensure your own survival. It takes you out of yourself. It helps you to rise above your fears. Now you're a rescuer, not a victim. And seeing how your leadership and skill buoy others up gives you more focus and energy to persevere. The cycle reinforces itself: You buoy them up, and their response buoys you up. Many people who survive alone report that they were doing it for someone else (a wife, boyfriend, mother, son) back home."
- from Deep Survival(pp. 180-181)
Inspiration can come from many different places. Maybe you'll find this video moving - I know I did: