In being true to the small voice within, you are being of service to others and to the world in the most profound way possible. You cannot know where that voice will take you, but in being willing "to save the only life you could save," you are affirming one of the deepest and most sobering truths of all: no one else can ever walk your journey for you. You alone can respond to your call.
Wisdom and compassion must walk together. Having wisdom without compassion is like walking with one foot. You will fall down. If you have both wisdom and compassion, you can walk very well, step by step.