Taking on the mystery is yielding to grace, letting go of all explanations, analyses, ideologies, self-images, images of God, agendas, expectations. Taking on the mystery is undergoing the finitude of years, hallowing diminishments, and living into the solitude of our own integrity. Taking on the mystery is undergoing the pain of learning that there are no empires favored by the Holy One: not the Roman, or the British, or the Soviet, or the American. Taking on the mystery is undergoing the grief of understanding that there are no theologies favored by the Holy One: not communism or capitalism, not Islam, Judaism, or Christianity. Taking on the mystery is acknowledging that we cannot name the mystery, though we try; we cannot claim the mystery, though we do. The mystery names and claim us, inviting us to take it upon ourselves as if we were God's spies.
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.