The opinion that there are bounds to human knowledge which it is impossible to pass, compelling man to stop short of the invisible world, is thus met by the occult scientist: he says that there can exist no doubt concerning the impossibility of penetrating into the unseen world by means of the kind of cognition here meant. One who considers it the only kind can come to no other opinion than that man is not permitted to penetrate into a possibly existing higher world. But the occult scientist goes on to say that it is possible to develop a different sort of cognition, and that this leads into the unseen world. If this kind of cognition is held to be impossible, we arrive at a point of view from which any mention of an invisible world appears as sheer nonsense. But to an unbiased judgment there can be no basis for such an opinion as this, except that its adherent is a stranger to that other kind of cognition. But how can a person form an opinion about a subject of which he declares himself ignorant? Occult science must in this case maintain the principle that people should speak only of what they know, and should not make assertions about anything of which they are ignorant. It can only recognize every man’s right to communicate his own experiences, not every man’s right to declare the impossibility of what he does not, or will not, know. The occult scientist disputes no one’s right to ignore the invisible world; but there can be no real reason why a person should declare himself an authority, not only on what he may know, but also on things considered unknowable. To those who say that it is presumption to penetrate into unseen regions, the occult scientist would merely point out that this _can_ be done, and that it is sinning against the faculties with which man has been endowed if he allows them to waste instead of developing and using them. But he who thinks that views about the unseen world are necessarily wholly dependent on personal opinion and feeling is denying the common essence of all human beings. Even though it is true that every one must find light on these things within himself, it is also a fact that all those, who go far enough, arrive at the same, not at different conclusions regarding them. Differences exist only as long as people will not approach the highest truths by the well-tested path of occult science, but attempt ways of their own choosing. Genuine occult science will certainly fully admit that only one who has followed, or at any rate has begun to follow the path of occult science, is in a position to recognize it as the right one. But all those who follow that path will recognize its genuineness, and have always done so.