In the first place it must be admitted that the assertion is still unproved, that a positive result of research has ever come in hopeless conflict with a dogma of faith; hence that science has been prevented from accepting this result. No such case can be found. The condemnation of the Copernican view of the world will be considered presently; we pass over the fact that at the time of its condemnation it was not a positive result of science: the main point is that the condemnation was not an irrevocable dogma of faith, but only the decision of a Congregation, which was withdrawn as soon as the truth was clearly demonstrated. Besides, science has suffered no injury from that decision. In general, where there is real contradiction between science and faith, the matters in question are invariably _hypotheses_. Is it more than an hypothesis, and a very doubtful hypothesis at that, that the world and God are identical, that there is an eternal, uncreated course of the world, that miracles are impossible? That what is said about the natural origin of Christianity, the origin of the Jewish religion from Babylonian myths, the origin of all religions from fear, fancy, or deception, is it anything more than hypothetical? The false systems of knowledge, subjectivism, and agnosticism—are they more than hypotheses? Ask their originators and champions; they will admit it themselves; and if they will not admit it, others will tell them that their propositions are not only hypotheses, but often quite untenable. There is hardly a single hypothesis which has not its vehement opponents. That the serious conflict between dogma and science is waged only in this field could be proved by abundant examples. Besides, is it not the philosophical axiom of modern freedom of thought, that in the sphere of philosophy and religion there is no certain knowledge, but only supposition? Can hypotheses claim to rank as assured results of research which should be universally accepted? Why should it not be allowed to contradict them, to oppose them with other suppositions? Is it not in the interest of science that this be done, that they be subjected to sharp criticism, lest they gradually be given out for positive results? Is it not a shameful trifling with the truth, when a _Haeckel_ deceives wide circles by pretending that most frivolous hypotheses are established results of science? Is it not misleading when modern science treats the rejection of a supernatural order as an established principle?