“Advantage! What is advantage? And will you take it upon yourself to define with perfect accuracy in what the advantage of man consists? And what if it so happens that a man's advantage, sometimes, not only may, but even must, consist in his desiring in certain cases what is harmful to himself and not advantageous. And if so, if there can be such a case, the whole principle falls into dust. What do you think–are there such cases? You laugh; laugh away, gentlemen, but only answer me: have man's advantages been reckoned up with perfect certainty?”