I will continue calmly concerning persons with strong nerves who do not understand a certain refinement of enjoyment. Though in certain circumstances these gentlemen bellow their loudest like bulls, though this, let us suppose, does them the greatest credit, yet, as I have said already, confronted with the impossible they subside at once. The impossible means the stone wall! What stone wall? Why, of course, the laws of nature, the deductions of natural science, mathematics. As soon as they prove to you, for instance, that you are descended from a monkey, then it is no use scowling, accept it for a fact. When they prove to you that in reality one drop of your own fat must be dearer to you than a hundred thousand of your fellow-creatures, and that this conclusion is the final solution of all so-called virtues and duties and all such prejudices and fancies, then you have just to accept it, there is no help for it, for twice two is a law of mathematics. Just try refuting it.