Someone with whom we have a lifetime's worth of lessons to learn is someone whose presence in our lives forces us to grow...those who consciously or unconsciously challenge our fearful positions. They show us our walls. Our walls are our wounds--the places where we feel we can't love any more, can't connect any more deeply, can't forgive past a certain point. We are in each other's lives in order to help us see where we most need healing, and in order to help us heal.