There is a cute, though wonderfully accurate, metaphor for what has to happen within a good friendship. A good friendship can be compared to two porcupines caught in a snowstorm. Whenever they get too far away from each other, they begin to feel cold. Yet if they get too close to each other, their quills begin hurting each other. They are forced then to maintain a very delicate balance between distance and closeness.

—Ronald Rolheiser, The Restless Heart: Finding Our Spiritual Home in Times of Loneliness