He then passes to another phase and receives reason, by which he discerns things necessary, possible, and impossible; in a word, all the notions which he could not combine in the former stages of his existence. But beyond reason and at a higher level by a new faculty of vision is bestowed upon him, by which he perceives invisible things, the secrets of the future and other concepts as inaccessible to reason as the concepts of reason are inaccessible to mere discrimination and what is perceived by discrimination to the senses. Just as the man possessed only of discrimination rejects and denies the notions acquired by reason, so do certain rationalists reject and deny the notion of inspiration. It is a proof of their profound ignorance; for, instead of argument, they merely deny inspiration as a sphere unknown and possessing no real existence. In the same way, a man blind from birth, who knows neither by experience nor by information what colors and forms are, neither knows nor understands them when some one speaks of them to him for the first time. God, wishing to render intelligible to men the idea of inspiration, has given them a kind of glimpse of it in sleep. In fact, man perceives while asleep the things of the invisible world either clearly manifest or under the veil of allegory to be subsequently lifted by divination. If, however, one was to say to a person who had never himself experienced these dreams that, in a state of lethargy resembling death and during the complete suspension of sight, hearing, and all the senses, a man can see the things of the invisible world, this person would exclaim, and seek to prove the impossibility of these visions by some such argument as the following: "The sensitive faculties are the causes of perception. Now, if one can perceive certain things when one is in full possession of these faculties, how much more is their perception impossible when these faculties are suspended." The falsity of such an argument is shown by evidence and experience. For in the same way as reason constitutes a particular phase of existence in which intellectual concepts are perceived which are hidden from the senses, similarly, inspiration is a special state in which the inner eye discovers, revealed by a celestial light, mysteries out of the reach of reason. The doubts which are raised regarding inspiration relate (1) to its possibility, (2) to its real and actual existence, (3) to its manifestation in this or that person. To prove the possibility of inspiration is to prove that it belongs to a category of branches of knowledge which can not be attained by reason. It is the same with medical science and astronomy. He who studies them is obliged to recognize that they are derived solely from the revelation and special grace of God. Some astronomical phenomena only occur once in a thousand years; how then can we know them by experience?