Thus they frankly violate the scientific method that demands acceptance of the explanation demonstrated as necessary, and violate it only for the reason to dodge the acknowledgment of a Creator. This is not science, but politics. But let us ask, Why should it be against science to reckon with supernatural factors? Is it because we cannot disclose with certainty the other world? Are they not aware that such a principle is opposed by the conviction of all mankind, that always held these conceptions to be the highest, and therefore not to be considered illusions? Do they not see, moreover, how they involve themselves in flagrant contradictions? Does not science by means of its laws of reasoning, especially on the principle of causality, constantly infer invisible causes from visible facts? From physical-chemical facts ether and physical atoms, which no man has ever seen, are deduced: from falling stones and the movement of astral bodies is inferred a universal gravitation, undemonstrable by experience; from an anonymous letter is deduced an author. The astronomer deduces from certain facts that fixed stars must have dark companions, visible to no one; from disturbances in the movements of Uranus _Leverrier_ found by calculation the existence and location of Neptune, then not as yet discovered. Hence, what does it mean: “to fall back upon explanations of this sort always amounts to straying away from scientific ground”? Let us imagine a noble vessel on the high seas to have become the victim of a catastrophe. It lies now at the bottom of the sea. Fishes come from all sides and stop musingly before the strange visitor. Whence did this come? Was it made out of water? Impossible! Did it creep up from the bottom of the sea? No! At last a fish reasons: “What we see here has undoubtedly come down to us from a higher world, far above us, and invisible to us.” The speech meets with approval. But another fish objects: “Nonsense! To fall back upon explanations of this sort always amounts to straying away from the scientific grounds on which we fish must stand. We cannot assume such a world to exist, because this would offend against the first principle of our science, the principle of the exclusive natural causation of sea and water.” With these words the speaker departs, wagging his tail, his speech having been received with stupefaction rather than with understanding.