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.
Prayer may take the shape of sacrifice, supplication, adoration or meditation; it may even appear in simple daily acts of kindness; but it is always the outer visible sign of an inward communion with the Divine.