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.
Whoever deeply searches out the truth and will not be deceived by paths untrue, shall turn unto himself his inward gaze, shall bring his wandering thoughts in circle home and teach his heart that what it seeks abroad, it holds in its own treasure chests within.