Modern science neither affirms nor denies miracle; it ignores it, necessarily. It is, for it, as if it did not exist. Religious persons, who often look towards science to ascertain what their faith may hope or fear from it, only consider its results, and as these are never definitive, but always variable, always being revised, enlarged, enriched, they secretly indulge the hope that a moment may come when science, which has not yet welcomed miracle, will welcome it; that such a fact, supported by such and such testimony, will in the end conquer its resistances and obtain a place in the category or the catalogue of scientific facts. They would quickly lose this illusion, if, turning away from the net results of science, they would fix their attention on its processes and methods of investigation. What is it, according to science, to know a phenomenon? It is to place it in a necessary link of succession, concomitance, and causality with other phenomena which explain it by analogy. Suppose a mysterious phenomenon without analogy and connection with any other; savants brought into its presence will declare themselves simply in a state of ignorance with respect to it. They will say they have not discovered the cause of it, that they cannot explain it; they will study it on every side a thousand times if necessary until they have torn out the heart of the mystery. Either they will succeed, or on this point there will never be science made or explanation established. Savants, it is true, are the first to recognise and to proclaim, in all domains, the limitations of their knowledge. The most advanced are the most modest. They all have the feeling that their discoveries are but a beginning, and that the part of Nature they have explored is as nothing to that of which they are ignorant. They hold themselves in readiness to modify the laws they have established, to enlarge their hypotheses, to make new ones, to record all facts which observation may supply. That many facts astonish them and disconcert them, we see every day. But mark the attitude of the true savant in face of these new phenomena. Does he doubt a single moment that they obey laws, unknown perhaps, but certain? ... There can only be science of that which is general and constant.