"In a friend one should have one's best enemy. You should be closest to him with your heart when you resist him."
"Your compassion should be a guess–to know first whether your friend wants compassion. Perhaps what he loves in you is the unbroken eye and the glance of eternity. Compassion for the friend should conceal itself under a hard shell, and you should break a tooth on it. That way it will have delicacy and sweetness," – Friedrich Nietzsche.