It really boils down to this: that all life is interrelated. We are all caught in an inescapable network of mutuality, tied to a single garment of destiny. Whatever affects one directly, affects all indirectly.
To become a teacher of Love, we need only be willing to hear Love's Voice and no other. Our responsibility is to let fear and guilt be undone in us, so that this Voice is clear within us. The light of heaven stands behind the veil of unforgiveness that we have drawn between ourselves and others; a dhadow waiting for forgiveness to remove it at last. The light of God is then freed to shine through the heart and extend out into the world.