But a friend is a sane man who exercises not my ingenuity, but me. My friend gives me entertainment without requiring any stipulation on my part. A friend, therefore, is a sort of paradox in nature. I who alone am, I who see nothing in nature whose existence I can affirm with equal evidence to my own, behold now the semblance of my being in all its height, variety and curiosity, reiterated in a foreign form; so that a friend may well be reckoned the masterpiece of nature.
