What are our criteria for telling friend from foe? A friend might be the cause of emotional upheavals and negative habits, while a so-called foe might profit us immensely. It's often when someone hurts us that we have a breakthrough in understanding. The teachings often penetrate when things fall apart. "Friend" and "enemy" are common concepts; but it's hard to say who will help or hinder the process of awakening.
— Pema Chodron, No Time to Lose